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Learn With Rupam

Rupam Das

@rupam-das-wW5CvN • Oct 26, 2024

Oct 26, 2024

1.6K

In my opinion, the main hurdle a computer science engineer faces in the problem of practical. All these mug ups of lab program kills the time and opportunity of Learning. Now I am starting this thread for young aspirant CS students.

The objective is as bellow, I will post a simple problem and you have to write simple C-program to offer the solution. You need to post your program and the screenshot of the output. The curricula will be such that you get interest from basic to the most complex of algorithms.

If you are willing to put effort, lets work together.

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Rupam Das

@rupam-das-wW5CvN • Oct 10, 2011

1. Write a Simple C-program to print if a given number is even or odd

criteria:

You can not use % operator
time : upto thrursday 5:30 IST.

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harishproject

@harishproject-nb87Qw • Oct 11, 2011

Re: 1. Write a Simple C-program to print if a given number is even or odd

#include<stdio.h>
void check(int n);
void main()
{
int n;
printf("\n Enter the number \n");
scanf("%d",&n);
check(n);
}
void check(int n)
{
int temp=n;
for(int i=0;i<temp/2;i++)
{
n=n-2;
}
if(n==0)
printf("%d is even",temp);
else
printf("%d is odd",temp);
}

is this correct

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harishproject

@harishproject-nb87Qw • Oct 11, 2011

Re: 1. Write a Simple C-program to print if a given number is even or odd

and also
#include<stdio.h>
void check(int n);
void main()
{
int n;
printf("\n Enter the number \n");
scanf("%d",&n);
check(n);
}
void check(int n)
{
int temp=n,q;
q=temp/2;
n=n-(2*q);
if(n==0)
printf("%d is even",temp);
else
printf("%d is odd",temp);
}

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Rupam Das

@rupam-das-wW5CvN • Oct 13, 2011

Re: 1. Write a Simple C-program to print if a given number is even or odd

harishprojectand also
#include<stdio.h>
void check(int n);
void main()
{
int n;
printf("\n Enter the number \n");
scanf("%d",&n);
check(n);
}
void check(int n)
{
int temp=n,q;
q=temp/2;
n=n-(2*q);
if(n==0)
printf("%d is even",temp);
else
printf("%d is odd",temp);
}
Bravo Harish..................... Great work!

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Rupam Das

@rupam-das-wW5CvN • Oct 13, 2011

Here is the Second Question: Write a Simple C program that Scan an even number

Criteria:

Once user gives an input, the scanning part must check if the number is even or not and should keep prompting the user for a valid even number input. if user fails to input correct number in 5 attempts, program should terminate.
😀

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harishproject

@harishproject-nb87Qw • Oct 13, 2011

#include<stdio.h>
#include<stdlib.h>
void check(int n);
void main()
{
int n;
for(int i=0;i<5;i++)
{
printf("\n Enter a valid even number number \n");
scanf("%d",&n);
if(n%2!=0)
continue;
else
{
printf("%d is even\n",n);
break;
}
}
exit(0);
}

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Rupam Das

@rupam-das-wW5CvN • Oct 13, 2011

Great Going Harish. Now try this with a do-while loop

Do while is the best technique for validating. Just try out. That is the most efficient method. I know you will do this.

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harishproject

@harishproject-nb87Qw • Oct 14, 2011

Re: Great Going Harish. Now try this with a do-while loop

#include<stdio.h>
#include<stdlib.h>
void check(int n);
void main()
{
int n,i=1;
do
{
printf("\n Enter a valid even number number \n");
scanf("%d",&n);
i++;
if(n%2!=0)
continue;
else
{
printf("%d is even\n",n);
break;
}
}while(i<=5);
exit(0);
}

ok did intrepret your question properly?

and as i know for and do while execute same no. times here.can i know y is do while efficient?

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H.Ali

@hali-nLubW1 • Oct 14, 2011

#include<stdio.h>
#include<conio.h>
void main()
{
int n,i=0;

do {
clrscr();
printf("enter an EVEN No.\n");
scanf("%d",&n);
i++;
continue;
}while(n%2!=0&&i<5);
if(n%2==0)
printf("the enterd even No. is %d",n);
else
printf("LOSER\n you entered ODD No. in all your 5 chances !");
getch();
}

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Rupam Das

@rupam-das-wW5CvN • Oct 14, 2011

Ali....that was what exactly i was looking for and that is exactly how it must be done.

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Rupam Das

@rupam-das-wW5CvN • Oct 14, 2011

Ok The Next One: 3. A Simple Program to Find the Factorial of a Number

But the Criteria is You can not use any sort of Loops: while,for, do while. And Recursion is also not permitted.

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simplycoder

@simplycoder-NsBEdD • Oct 14, 2011

My code for Odd-Even numbers.

#include<iostream>
//simplycoder

using namespace std;
int main(int argc,char**argv)

{
    int num;
    scanf("%d",&num);
    num&1?printf("ODD\n"):printf("EVEN\n");
system("PAUSE");
return 0;
}

Rupam Das

@rupam-das-wW5CvN • Oct 14, 2011

@simplycoder, This is what I was Expecting. Professionally Done and you are "My Programmer of The day" . Real cool.

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simplycoder

@simplycoder-NsBEdD • Oct 14, 2011

Nothing much to think of rather than Gamma-Functions and so on.
I coded many series,out of which this series gave me the best and most accurate solution out of all.
This approximation is called as Nemes approximation.

#include<iostream>
#include<math.h>
//simplycoder

using namespace std;
int main(int argc,char**argv)

{
    int x;
    scanf("%d",&x);
  
          int z=x+1;

   double pi=3.1415926535897932;
   double e=2.71828182845904523;
 
   double term1=sqrt(2.0*pi/z);
   double term2=1.0/e;
   double term3=(12*z-1/(10*z));
   double term4=z+1.0/term3;
   term4=term4*term2;
   term4=pow(term4,z);
   term4=round(term4*term1);
    cout<<"n "<<x<<" fact : "<<term4<<endl;
   


   cout<<endl<<endl;
system("PAUSE");
return 0;
}

Rupam Das

@rupam-das-wW5CvN • Oct 14, 2011

Again Spot On. But I would Prefer Some more approaches. Lemme know how many of Engineers here can Think Out of the Box!

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H.Ali

@hali-nLubW1 • Oct 15, 2011
simplycoderMy code for Odd-Even numbers.
```
    num&1?printf("ODD\n"):printf("EVEN\n");

}
```
@simply coder please explain how this woks...

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simplycoder

@simplycoder-NsBEdD • Oct 15, 2011

Its binary maths.
Refer to my previous tutorial which involves bit-operators for more explanation.
In short,all odd numbers have their last bit set to be 1 and all even number have last bit set to 0.
So the above code works,
condition?cout<<...:cout<<..
is similar to if-else.

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Rupam Das

@rupam-das-wW5CvN • Oct 17, 2011

Next Assignment: 3) Find the Factorial of 65 in turbo C

This is simplest isn't it? Find the factorial of 65 in Turbo C. If you are using boroland C++ or .Net, find the factorial of 1024 😀

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Rupam Das

@rupam-das-wW5CvN • Oct 17, 2011

Next Assignment: Declare an Array in Turbo C which can store 100x100 double values. Store and retrieve the values. As Simple as that. 😀

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simplycoder

@simplycoder-NsBEdD • Oct 18, 2011

I would not want to spoil this for other members but here is the slightest hint.This is not to be considered as normal and easy problem for findinf factorial, largest data-type is not sufficient to fit in all the numbers.
Hint: use arrays.

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H.Ali

@hali-nLubW1 • Oct 19, 2011

Rupam DasNext Assignment: Declare an Array in Turbo C which can store 100x100 double values. Store and retrieve the values. As Simple as that. 😀
Array size is too large !!! 😐 dont know what to do .... let others try.. 😒

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Rupam Das

@rupam-das-wW5CvN • Oct 19, 2011

Thats why this thread is created. It needs to be solved.

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H.Ali

@hali-nLubW1 • Dec 18, 2011

No One to answer this...
Rupam please post the Answer and the Next assignment....

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Kashif Mehmood

@kashif-mehmood-OZKLiv • Apr 20, 2015

Hello Sir , i am new member here , i am in 3rd year of computer science i have to submit proposal for final year project but dont have any idea
my areas of intrest are:
Andriod
Gaming
Netwroking

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Faisal Ali

@faisal-ali-Rvy5ab • Jan 19, 2016

Hi...
Sir i have read all your cs project ideas...no doubt all that projects are outstanding
I personally asking you to suggest me a project which is unique...and not limited...
Am a computer science student and my grip in c#
A project which will be most usable..
Thank you soo much if you help me....

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