FLAMES code

@enthudrives • 16 May, 2009

#include<iostream.h>
#include<conio.h>
#include<string.h>
main()
{
      int f[6]={0,0,0,0,0,0},n,ch;
      char n1[100],n2[100];
      gets(n1);
      gets(n2);
      int l1,l2;
      l1=strlen(n1);
      l2=strlen(n2);
      int i,j;
      for(i=l1-1;i>=0;i--)
      {
            if(n1[i]!='\0')
            {
            for(j=l2-1;j>=0;j--)
            {
                                if(n2[j]!='\0')
                                {
                                                              if(n1[i]==n2[j])
                                                               {
                                                                              n1[i]=n2[j]='\0';
                                                                              break;
                                                               }
                                }
                                
            }      
            }
      }
      int count=0;
      for(i=0;i<l1;i++)
      {
                       if(n1[i]!='\0')
                        count=count+1;
      }
      for(j=0;j<l2;j++)
      {
                       if(n2[j]!='\0')
                         count=count+1;
      }
cout<<"count is "<<count;
}

This code counts the number of letters left after striking out the common letters.

@shalini_goel14 • 16 May, 2009 Cool something different to code but does your code takes care of following scenario?

If any of the two names are like following
ABCDA
DEFA

Then in above case, first name has two 'A' s and second name has only one 'A' so do the program should cancel all 3 'A's or should cancel only 2'A's -one from each name?

@enthudrives • 16 May, 2009 no. only 2 'A's will be cancelled.

@pradeep_agrawal • 17 May, 2009

enthudrives

This code counts the number of letters left after striking out the common letters.

The code currently does not gives the correct output. E.g., consider
Name 1: Pradeep
Name 2: Prad

The output should 3 but the code give output as 2.

The code need small correction for this:

n1[i]=n2[i]='\0';

need to be changed to

 n1[i]=n2[j]='\0';

Also the check

if(n1[i]!='\0')

inside the first for loop is not required (though it does not create and issue).

What if after removing common characters nothing is left-out (e.g., i compare Pradeep with Pradeep)?

-Pradeep

@enthudrives • 17 May, 2009

pradeep_agrawal

The code currently does not gives the correct output. E.g., consider
Name 1: Pradeep
Name 2: Prad

The output should 3 but the code give output as 2.

I get the output as 3 only. Try executing it once again.

i edited

  n1[i]=n2[j]='\0';

Thanks 😀

And if nothing is left out, it will be considered as Friends 😀

@pradeep_agrawal • 17 May, 2009 Below is my code for the given problem statement.

#include "stdio.h"
#include "string.h"


#define MAX_NAME_LEN 80
#define INVALID 0
#define VALID 1
#define ASCII_UPPER_CASE_LOWER_LIMIT 65
#define ASCII_UPPER_CASE_UPPER_LIMIT 90
#define ASCII_LOWER_CASE_LOWER_LIMIT 97
#define ASCII_LOWER_CASE_UPPER_LIMIT 122
#define UPPER_CASE_LOWER_CASE_DIFF ASCII_LOWER_CASE_LOWER_LIMIT - ASCII_UPPER_CASE_LOWER_LIMIT


typedef enum {EMPTY = 0, FRIENDS, LOVE, AFFECTION, MARRIAGE, ENEMIES, SIBLINGS} flames_t;


/* Validates if name contains only alphabets */
int validate_name(char* name, int len) {
  int i = 0;
  for(i = 0; i < len; i++) {
    if(!(((name[i] >= ASCII_LOWER_CASE_LOWER_LIMIT)
        && (name[i] <= ASCII_LOWER_CASE_UPPER_LIMIT))
        || ((name[i] >= ASCII_UPPER_CASE_LOWER_LIMIT)
        && (name[i] <= ASCII_UPPER_CASE_UPPER_LIMIT)))) {
      return INVALID;
    }
  }
  return VALID;
}


/* Convert all characters to upper case */
void convert_to_upper_case(char *name, int len) {
  int i = 0;
  for(i=0; i < len; i++) {
    if((name[i] >= ASCII_LOWER_CASE_LOWER_LIMIT)
        && (name[i] <= ASCII_LOWER_CASE_UPPER_LIMIT)) {
        name[i] -= UPPER_CASE_LOWER_CASE_DIFF;
    }
  }
}


/* Eliminates common characters from both name by replacing them by '/0' */
void eliminate_common_characters(char *name1, int len1, char *name2, int len2) {
  int i = 0, j = 0;
  for(i = 0; i < len1; i++) {
    for(j = 0; j < len2; j++) {
      if(name1[i] == name2[j]) {
        name1[i] = name2[j] ='\0';
        break;
      }
    }
  }
}


/* Count the number of characters in a string that has non-zero value */
int char_count(char *name, int len) {
  int count = 0;
  int i = 0;
  for(i = 0; i < len; i++) {
    if(name[i] !='\0') {
      count++;
    }
  }
  return count;
}


/* Determine applicable flames based on number of uncommon characters */
flames_t determine_applicable_flames(int count) {
  //declaring array containing each item of flames
  //all except 1 element will be one by one set to EMPTY based on calculation
  flames_t flames[6] = {FRIENDS, LOVE, AFFECTION, MARRIAGE, ENEMIES, SIBLINGS};

  //declaring variable to hold the result of calculation
  //initializing by EMPTY
  //if variable does not get reset, EMPTY will specify error in calculation
  flames_t result = EMPTY;

  //declaring a varibale to keep track of last deleted flames item
  int index = 0;

  int i = 0, j = 0;

  //checking number of uncommon characters
  //for 0 uncommon characters, flames should be Friends
  if(count != 0) {
    //five of six items of flames need to be removed
    //removing one item per loop
    for(i = 1; i <= 5; i++) {
      j = 0;
      while(1) {
        //considering flames items that still exist
        if(flames[index] != EMPTY) {
          j++;
        }

        //if the current item is "uncommon character count" item
        //remove the item by setting value to EMPTY
        if(j == count) {
          flames[index] = EMPTY;
          break;
        } else {
          index++;

          //flames items have index from 0 to 5
          //reseting index to 0, when it's incremented after checking last item
          index = index % 6;
        }
      }
    }

    for(i = 0; i <= 5; i++) {
      if(flames[i] != EMPTY) {
        result = flames[i];
        break;
      }
    }
  } else {
    //setting flames to Friends
    result = FRIENDS;
  }

  return result;
}


/* Display the applicable flames */
void display_applicable_flames(flames_t flames) {
  switch(flames) {
  case EMPTY:
    printf("Error in calculation\n");
    break;
  case FRIENDS:
    printf("Friends\n");
    break;
  case LOVE:
    printf("Love\n");
    break;
  case AFFECTION:
    printf("Affection\n");
    break;
  case MARRIAGE:
    printf("Marriage\n");
    break;
  case ENEMIES:
    printf("Enemies\n");
    break;
  case SIBLINGS:
    printf("Siblings\n");
   break;
  }
}


int main() {
  flames_t result = EMPTY;
  char name1[MAX_NAME_LEN] = {0};
  char name2[MAX_NAME_LEN] = {0};
  int len1 = 0, len2 = 0;
  int count = 0;
  int i = 0, j = 0;

  //taking names as input
  scanf("%s", name1);
  scanf("%s", name2);

  //determining length of names
  len1 = strlen(name1);
  len2 = strlen(name2);

  //validating names
  if((validate_name(name1, len1) == INVALID)
      || (validate_name(name2, len2) == INVALID)) {
    printf("Invalid names\n");
    return 0;
  }

  //converting all characters of string to upper case
  convert_to_upper_case(name1, len1);
  convert_to_upper_case(name2, len2);

  //eliminating common characters from both names
  eliminate_common_characters(name1, len1, name2, len2);

  //counting number of uncommon characters in both names
  count = char_count(name1, len1) + char_count(name2, len2);

  //determining the flames applicable based on the number of uncommon characters
  result = determine_applicable_flames(count);

  //displaying the applicable flame count
  display_applicable_flames(result);

  return 0;
}

Compile the file with above code and run as:
a.exe < input.txt > output.txt [on windows]
a.out < input.txt > output.txt [on linux]

Here,
a.exe or a.out are the executables generated after compilation

input.txt is the file containing two names for which FLAMES need to be calculated, e.g., if the names are Pradeep and Prad, then input.txt will be
Pradeep
Prad

P.S.:
1. The input can be in same line separated by space as
Pradeep Prad
2. The code considers that the maximum length of a name will be 79 characters. To change the maximum length modify the pre-processor directive MAX_NAME_LEN and recompile the code.

output.txt is the output file containing result, for given example output.txt will contain
Friends

-Pradeep

@enthudrives • 17 May, 2009 can u please explain your logic?

@pradeep_agrawal • 17 May, 2009 I have modified the code to make some items self-explanatory. Also added comments to the code.

The main logic to calculating FLAMES based on the calculated number of uncommon characters is written in function "determine_applicable_flames". Let me know if it need more explanation.

-Pradeep

@shalini_goel14 • 17 May, 2009 Please ckeck my program also in Java for this Flames thing. Any doubts or flaws in this, feel free to speak. 😀

/*
 * FlamesProgram.java
 *
 * Created on May 18, 2009, 9:54 AM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */
package myjava;
import java.util.ArrayList;
/**
 *
 * @author shalinig
 */
public class FlamesProgram {
    
    public static void main(String[] args) {
        
        /* Specify any name1 -hardcoded */
        StringBuilder name1 = new StringBuilder("Pradeep");
        /* Specify any name2 -hardcoded*/
        StringBuilder name2 = new StringBuilder("Pradeep");
        ArrayList<String> flamesArrayList = new ArrayList<String>();
        int count = 0;
        
        
        System.out.println("Name 1: " + name1.toString());
        System.out.println("Name 2: " + name2.toString());
        
        name1.replace(0,name1.length(),name1.toString().toUpperCase());
        name2.replace(0,name2.length(),name2.toString().toUpperCase());
        
        if(!name1.toString().equalsIgnoreCase(name2.toString())){
            
            
            /* Loop to replace all common letters in both names with 1 */
            for (int i = 0; i < name1.length(); i++) {
                
                for (int j = 0; j < name2.length(); j++) {
                    
                    if (name1.charAt(i)!='1' && name2.charAt(j)!='1' && (name1.charAt(i) == name2.charAt(j))) {
                        name1.replace(i, i + 1, "1");
                        name2.replace(j, j + 1, "1");
                        count+=2;
                        
                    }
                }
                
            }
            
            
            
            count=name1.length()+name2.length()-count;
            
            /* Adds the FLAMES into an arrayList */
            flamesArrayList.add("F");
            flamesArrayList.add("L");
            flamesArrayList.add("A");
            flamesArrayList.add("M");
            flamesArrayList.add("E");
            flamesArrayList.add("S");
            
            /* Loop that calculates Flames */
            for (int i = flamesArrayList.size(); i > 1; i--) {
                
                int index = count % (i);
                int temp = flamesArrayList.size() - index;
                if (index == 0) {
                    flamesArrayList.remove(flamesArrayList.size() - 1);
                } else {
                    flamesArrayList.remove(index - 1);
                }
                
                for (int k = 0; k <= temp && temp < flamesArrayList.size(); k++) {
                    
                    flamesArrayList.add(k, flamesArrayList.get(flamesArrayList.size() - temp));
                    flamesArrayList.remove(flamesArrayList.size() - temp);
                    temp--;
                    
                }
                
            }
            /* Finally arrayList is left with only one letter which determines flame */
            System.out.println("Flame in between is : " + determineFlameType(flamesArrayList.get(0)));
            
        }else{
            System.out.println("Both the names are same");
        }
        
    }
    
    /* Static method that returns the type of Flame based on the flame letter passed */
    public static String determineFlameType(String flameLetter) {
        
        String flameType = null;
        switch (flameLetter.charAt(0)) {
            
            case 'F':
                flameType = "Friends";
                break;
            case 'L':
                flameType = "Love";
                break;
            case 'A':
                flameType = "Affection";
                break;
            case 'M':
                flameType = "Marriage";
                break;
            case 'E':
                flameType = "Enemy";
                break;
            case 'S':
                flameType = "Siblings";
                break;
        }
        
        return flameType;
    }
}

Output :

Name 1: Pradeep
Name 2: Pradeep
Both the names are same

@enthudrives • 17 May, 2009 @ Shalini
I am not good at Java. I cant understand anything. Seems like greek 😔
If you dont mind, please do the same in C or C++. Please...

@shalini_goel14 • 17 May, 2009

enthudrives

@ Shalini
I am not good at Java. I cant understand anything. Seems like greek 😔
If you dont mind, please do the same in C or C++. Please...

Like you don't understand Java, I don't undestand C/C++. By the way if you don't understand anything in it, you can ask and better start learning Java.😀

@pradeep_agrawal • 17 May, 2009

shalini_goel14

Please ckeck my program also in Java for this Flames thing. Any doubts or flaws in this, feel free to speak. 😀

Shalini, i looked into the code, and it looks good to me. Just one correction, the code to remove common characters need some changes.
- Consider names as "Pradeep" and "Pradeep". Here the number of uncommon characters is 0, whereas your code gives number of uncommon characters as 2.
- To correct this, i feel you need to put a break statement inside the 'if' where you are comparing names.


The thing i really liked in the code:
1. Conversion of names to upper case before comparing characters (i validated names against both upper case and lower case but missed to consider this scenario while comparison 😔, i have now updated my code also 😉).
2. Some optimization techniques used in the code while calculating flames type, e.g.,
int index = count % (i);
It's a simple way to determine the flames type to be removed.
3. The use of existing API's.


Below are few items where i feel the code can be improved (all in terms of optimization):
1. While comparing names every time you are doing "name1.toString().toUpperCase().charAt(i)"
Instead you can just convert the name to upper case and store the same so that every time you have to just call charAt(i).
2. Instead of combining the strings and then calculating the count, the count for each name can be separately calculated and then added.
3. The code

for (int i = 0; i < newString.length(); i++) {
    count++;
    if (newString.charAt(i) == '1') {
        count--;
    }
}

can be changed to

for (int i = 0; i < newString.length(); i++) {
    if (newString.charAt(i) == '1') {
        count++;
    }
}

4. The code to calculate flames type is of order n^2 and can be reduced to order n^2.

-Pradeep

@shalini_goel14 • 17 May, 2009 Hi Pradeep,

Many thanks for the corrections. 😁

Actually I made this program in very hurry, so could not think of optimized way(Ya ! can make it more optimized 😉) , but coming to your point no 3 in improvements required, I feel your piece of suggested code would give me the count for characters that are 1 though I wanted count of characters thar are not 1. Anyways , for this it would be better if I could count it in "if" block of changing value as 1.

For same name checking, BUG, need to look into it. 😔

Upper case thing, yes you are right I knew it, it can be saved but I just showed my laziness in doing so just for finishing off this code quickly. 😛

Point no 4, I am not clear , you want to say optimization can be done from n[sup]2[/sup] to n[sup]2[/sup] ? 😒

Good to hear suggestions from you. 😀

PS: I have edited my last program accordingly.
Thanks !

@pradeep_agrawal • 18 May, 2009 Ahhh, i too replied in hurry 😉.

shalini_goel14

but coming to your point no 3 in improvements required, I feel your piece of suggested code would give me the count for characters that are 1 though I wanted count of characters thar are not 1. Anyways , for this it would be better if I could count it in "if" block of changing value as 1.

When i said

for (int i = 0; i < newString.length(); i++) {
    if (newString.charAt(i) == '1') {
        count++;
    }
}

I actually mean

for (int i = 0; i < newString.length(); i++) {
    if (newString.charAt(i) != '1') {
        count++;
    }
}

But the way you modified have the handling and currently calculating the count is also good.

shalini_goel14

Point no 4, I am not clear , you want to say optimization can be done from n[sup]2[/sup] to n[sup]2[/sup] ? 😒

Here i mean to say that optimization can be done from n^3 to n^2.

-Pradeep

@shalini_goel14 • 18 May, 2009

pradeep_agrawal

Here i mean to say that optimization can be done from n^3 to n^2.

Can you please explain how you got complexity as n[sup]3[/sup]. According to me, complexity is 2n[sup]2[/sup] ?

Correct me if I have any wrong concept ? 😔

@pradeep_agrawal • 18 May, 2009 Why i said that it's of order n^3 because:
1. The loop "for (int i = flamesArrayList.size(); i > 1; i--)" cause order of n.
2. The inner loop "for (int k = 0; k <= temp && temp < flamesArrayList.size(); k++)" cause another order n, making total complexity as order n^2.
3. The implementation of add/remove function of ArrayList itself is of order n, making total complexity to order n^3.

-Pradeep

@shalini_goel14 • 18 May, 2009

pradeep_agrawal

Why i said that it's of order n^3 because:
3. The implementation of add/remove function of ArrayList itself is of order n, making total complexity to order n^3.

-Pradeep

Oh yes thanks for reminding me point no 3.

@karty • 10 May, 2011 #include<stdio.h>
#include<conio.h>
#include<string.h>
#include<malloc.h>


typedef struct flames
{
char c;
struct flames *next;
}flames;

char* relation(char ch);

void main()
{
char s1[20],s2[20],s3[20],s4[20],f[]={"FLAMES"},ch;
int i=0,j=0,k=0,l1,l2,count=0,m=0;
flames *head,*ne2,*ne3,*ne4,*ne5,*ne6,*temp,*p;
char *relate;

printf("\n\nEnter First Name:: ");
gets(s1);
printf("\nEnter Second Name:: ");
gets(s2);

strcpy(s3,s1);
strcpy(s4,s2);

for(i=0;i<(l1=strlen(s1));i++)
{
for(j=0;j<(l2=strlen(s2));j++)
{
if(s1==s2[j])
{
s2[j]=-1;
s3=-1;
}

}
}


for(i=0;i<strlen(s3);i++)
{
if(s3!=-1)
count++;
}
for(j=0;j<strlen(s2);j++)
{
if(s2[j]!=-1)
count++;
}

printf("\n\n");
puts(s3);
puts(s2);
printf("\n\nLetters left are %d",count);


delay(100);
printf("\nchecking for F L A M E S..............\n\n");

///////////////////////////////////////////////////////////
/*Creating CLL for flames*/

head=(struct flames*)malloc(sizeof(struct flames));
ne2=(struct flames*)malloc(sizeof(struct flames));
ne3=(struct flames*)malloc(sizeof(struct flames));
ne4=(struct flames*)malloc(sizeof(struct flames));
ne5=(struct flames*)malloc(sizeof(struct flames));
ne6=(struct flames*)malloc(sizeof(struct flames));

head->c='f'; head->next=ne2;
ne2->c='l'; ne2->next=ne3;
ne3->c='a'; ne3->next=ne4;
ne4->c='m'; ne4->next=ne5;
ne5->c='e'; ne5->next=ne6;
ne6->c='s'; ne6->next=head;
/////displaying CLL
temp=head;
i=0;
while(i<6)
{
printf(" %c",temp->c-32);
temp=temp->next;
i++;
}
printf("\n");

temp=head;
while(m<5)
{
for(i=0;i<count-2;i++)
temp=temp->next;
printf("\nDeleting %c",temp->next->c);
p=temp->next;
temp->next=temp->next->next;
temp=temp->next;
free(p);
m++;
}
ch=temp->c;

printf("\n\tSo.....The Relation is :::::: ");
relate=relation(ch);

delay(500);
puts(relate);
printf("\n\n");
}

char* relation(char ch)
{
char *rel;

switch(ch)
{
case 'f':
return rel="FRIENDSHIP";


case 'l':
return rel="LOVE";


case 'a':
return rel="ATTRACTION";


case 'm':
return rel="MARRIAGE";


case 'e':
return rel="ENEMY";


case 's':
return rel="SISTER";
}
}

@PraveenKumar Purushothaman • 11 May, 2011 I am planning to work this out in PHP... 😀

@synergynext • 11 May, 2011

praveenscience

I am planning to work this out in PHP... 😀

sounds good 😁
those who understand C can also easily understand it, atleast I beleive that 😎

@PraveenKumar Purushothaman • 11 May, 2011 PHP is similar to Unix Shell Programming... It uses echo and stuff... 😀

@PraveenKumar Purushothaman • 16 May, 2011 Hey CEans... PHP Version here... https://www.crazyengineers.com/forum/computer-science-engineering/43275-php-version-flames-ready.html

@shabarinath • 02 Aug, 2011 #include<string.h>
#include<iostream.h>
#include<conio.h>
#include<stdio.h>
#include<conio.h>
void main()
{
char a[10],b[10];
// int count=5;
clrscr();
cout<<"\n Enter Name:";
gets(a);
puts(a);
int len=strlen(a);
cout<<"\n Lenght:"<<len;
cout<<"\n Enter another name:";
gets(b);
puts(b);
int len1=strlen(b);
cout<<"\n Length of Secong Name:"<<len<<"\n";
for(int i=0;i<=len;i++)
{
for(int j=0;j<=len1;j++)
{
if(a==b[j])
{
a=' ';
b[j]=' ';
}
}
}
for(i=0;i<len;i++)
{
cout<<a;

}
cout<<"\n";
for(i=0;i<len1;i++)
{
cout<<b;
}
cout<<"\n Enter how many no's are visible to you:";
int vis;
cin>>vis;
switch(vis)
{
case 1: cout<<"sister";
break;
case 2: cout<<"Enemy";
break;
case 3: cout<<"Friends";
break;
case 4: cout<<"Enemy";
break;
case 5: cout<<"Friends";
break;
case 6: cout<<"Marriage";
break;
case 7: cout<<"Enemy";
break;
case 8: cout<<"Affection";
break;
case 9: cout<<"Enemy";
break;
case 10:cout<<"Love";
break;
}
/* char flamesstr[]="FLAMES";
for(i=0;i<vis;i++)
{
if(i==vis-1)
{
if(flamesstr==' ')
{
i++;
flamesstr=' ';
}
else if(flamesstr!=' ')
{
flamesstr=' ';
}
/* else if(count==0)
{
break;
}
else
{
count--;
goto x;
}
}
} */


// puts(flamesstr);
getch();
}

@PraveenKumar Purushothaman • 02 Aug, 2011 Dude, use either C or C++. Don't use both... 😲

@shabarinath • 03 Aug, 2011 haha for jst for tme pass i have wrote that but for not any particular ...........

@eternalthinker • 04 Aug, 2011 I'm just linking the python version here 😉
FLAMES in python

@gokulml • 30 Jul, 2015 Here's my code:

#include<iostream.h>
#include<conio.h>
#include<string.h>
void del(char *x,int y,int z)
{
int i;
for(i=0;i<y;i++,x++);
for(i=y;i<z;i++,*x=*(x+1),x++);
}
char flames(int x)
{
int i,j=-1;
char s[]="flames";
while(strlen(s)!=1)
{
for(i=0;i<x;i++)
{
j++;
if(j==strlen(s))
j=0;
}
del(s,j,strlen(s));
j--;
}
return s[0];
}
void res(int x)
{
switch(flames(x))
{
case 'f':cout<<"Friend";
break;
case 'l':cout<<"Lover";
break;
case 'a':cout<<"Affection";
break;
case 'm':cout<<"Marriage";
break;
case 'e':cout<<"Enemy";
break;
case 's':cout<<"Sister";
}
}
void grafix(int x)
{
int i,j;
clrscr();
for(i=0;i<500;i++)
{
for(j=0;j<x;j++)
{
res(i);
cout<<"\t";
}
cout<<"\n";
}
clrscr();
}
void main()
{
char a[20],b[20],c[40];
int i,j,n;
clrscr();
cout<<"\nEnter your name: ";
cin>>a;
cout<<"\nEnter your lover name: ";
cin>>b;
grafix(9);
for(i=0;i<strlen(a);i++)
{
for(j=0;j<strlen(b);j++)
{
if(a==b[j])
{
del(a,i,strlen(a));
del(b,j,strlen(b));
i--;
j--;
}
}
}
strcpy(c,a);
strcat(c,b);
n=strlen(c);
cout<<"\n";
if(n==0)
cout<<"Flames";
else
res(n);
getch();
}

@Srikar-350 • 30 Oct, 2015

enthudrives

#include<iostream.h>
#include<conio.h>
#include<string.h>
main()
{
      int f[6]={0,0,0,0,0,0},n,ch;
      char n1[100],n2[100];
      gets(n1);
      gets(n2);
      int l1,l2;
      l1=strlen(n1);
      l2=strlen(n2);
      int i,j;
      for(i=l1-1;i>=0;i--)
      {
            if(n1[i]!='\0')
            {
            for(j=l2-1;j>=0;j--)
            {
                                if(n2[j]!='\0')
                                {
                                                              if(n1[i]==n2[j])
                                                               {
                                                                              n1[i]=n2[j]='\0';
                                                                              break;
                                                               }
                                }
                               
            }     
            }
      }
      int count=0;
      for(i=0;i<l1;i++)
      {
                       if(n1[i]!='\0')
                        count=count+1;
      }
      for(j=0;j<l2;j++)
      {
                       if(n2[j]!='\0')
                         count=count+1;
      }
cout<<"count is "<<count;
}

This code counts the number of letters left after striking out the common letters.

@Srikar-350 • 30 Oct, 2015 #include<iostream.h>
#include<conio.h>
#include<string.h>
main()
{
int f[6]={0,0,0,0,0,0},n,ch,count=0;
char n1[100],n2[100];
gets(n1);
gets(n2);
int l1,l2;
l1=strlen(n1);
l2=strlen(n2);
int i,j;
for(i=l1-1;i>=0;i--)
{
if(n1!='\0')
{
for(j=l2-1;j>=0;j--)
{
if(n2[j]!='\0')
{
if(n1==n2[j])
{
n1=n2[j]='\0';
count++; break;
}
}

}
}
}
|*no need of two loops to int count=0;
for(i=0;i<l1;i++)
{
if(n1!='\0')
count=count+1;
}
for(j=0;j<l2;j++)
{
if(n2[j]!='\0')
count=count+1;
}
*\
count=l1+l2-(2*count);
cout<<"count is "<<count;
}