3rd c++ Problem

Manish Goyal

@manish-r2Hoep • Oct 25, 2024

Oct 25, 2024

1.2K

Write a Program to check whether no is prime or not
without using
any /,% operator and If statement?

Like 0 Replies 16

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Manish Goyal

@manish-r2Hoep • Dec 31, 2009

52 views but no replies...
Give it a try at least...
otherwise i will give you a clue
0
gaurav.bhorkar

@gauravbhorkar-Pf9kZD • Dec 31, 2009

Please give a clue.
Maybe the problem should not allow use of Decision Control System and loops but allow use of %, /, *, etc.
0
Sahithi Pallavi

@sahithi-oJZaYj • Dec 31, 2009

Please give us a clue goyal...!
0
Hussanal Faroke

@hussanal-faroke-U5nNM8 • Dec 31, 2009

isdivis(a,b)
{
x=a;
while(x>b)
x-=b
a-b?return 0:return 1;
}
main:-
for(int j=2,j<number;j++)
isdivis(number,j):{cout<<"prime";break;}:continue;
0
Hussanal Faroke

@hussanal-faroke-U5nNM8 • Dec 31, 2009

Hussanal Faroke
isdivis(a,b)
{
x=a;
while(x>b)
x-=b
b-x?return 0:return 1;
}
main:-
for(int j=2,j<number;j++)
isdivis(number,j)?{cout<<"not prime";exit(0);}:continue;
cout<<"prime";
may be there is some errors in extreme... take ur own modification
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Manish Goyal

@manish-r2Hoep • Jan 1, 2010

Guys Hussanal Faroke gave you a great clue
yeah You can use ternary operator

Hussanal Faroke
isdivis(number,j):{cout<<"prime";break;}:continue;
Hussanal this statement ...seems to be illogical for me
however nice attempt you are very close..I mean very much close
Good
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gaurav.bhorkar

@gauravbhorkar-Pf9kZD • Jan 1, 2010

Use a loop to check the condition and goto to jump.

int main ()
{
int num ;
char * array[] = {"even", "odd"} ;
printf ("Enter any num") ;
scanf ("%d", &num) ;
while (num)
{
while (num == 1)
goto label1;
num -= 2 ;
}
label1 : printf ("The number is %s", array[num]) ;
return 0;
}
0
Manish Goyal

@manish-r2Hoep • Jan 1, 2010

gaurav.bhorkar
Use a loop to check the condition and goto to jump.

int main ()
{
int num ;
char * array[] = {"even", "odd"} ;
printf ("Enter any num") ;
scanf ("%d", &num) ;
while (num)
{
while (num == 1)
goto label1;
num -= 2 ;
}
label1 : printf ("The number is %s", array[num]) ;
return 0;
}
Hey Gaurav My question was to check whether no is prime or not?
Please read the Question before
0
gaurav.bhorkar

@gauravbhorkar-Pf9kZD • Jan 1, 2010

gaurav.bhorkar
Use a loop to check the condition and goto to jump.

int main ()
{
int num ;
char * array[] = {"even", "odd"} ;
printf ("Enter any num") ;
scanf ("%d", &num) ;
while (num)
{
while (num == 1)
goto label1;
num -= 2 ;
}
label1 : printf ("The number is %s", array[num]) ;
return 0;
}
char * array[] is the array of pointers to strings.

printf ("The number is %s", array[num]) ;
When value of num is 0, it prints "even" because the string "even" is present at position 0 in the array.
0
gaurav.bhorkar

@gauravbhorkar-Pf9kZD • Jan 1, 2010

Oh I am sorry!

I didn't read the question properly.

Sorry!
0
Manish Goyal

@manish-r2Hoep • Jan 1, 2010

I agree with you but that is fine for checking whether no is even or odd
absolutely correct No doubt

But I want to check whether no is prime or not...
I hope you got it

for eg

Please enter no
20
sory not a prime no

Please enter no

3
Yes it is a prime no

Take it easy dude.....The clue is already given....
0

Manish Goyal

@manish-r2Hoep • Jan 2, 2010

Okk Guys ...I think now i should give you the code ...
so here it is

#include<iostream.h>
#include<conio.h>
int main()
{
int i,no,a,b;
cout<<"Enter any no"<<endl;
cin>>no;
a=no;
for(i=2;i<no;i++)
{
    while(no>0)
    {
        no=no-i;
    }
    b=(no==0)?-1:1;
    (b==1)?(no=a):(i=no);
}
(b!=-1&no!=1)?cout<<"Prime no":cout<<"Not a prime no";
getch();
return 0;
}

gaurav.bhorkar

@gauravbhorkar-Pf9kZD • Jan 2, 2010

Oh! That was easy, wasn't that?

I was thinking too much.
0
Manish Goyal

@manish-r2Hoep • Jan 2, 2010

yeah Garauv
It was easy..just you were to show some crazIness....
Anyhow..thanks for giving it a try
0
Hussanal Faroke

@hussanal-faroke-U5nNM8 • Mar 15, 2011

I don't know how to delete one post that is why i edited like this!!!!!!!!!!!!!!

0
aicbal

@aicbal-t5T7aK • Mar 25, 2011

int main()
{
int num,i,j,flag=FALSE;
printf("Enter a number: ");
scanf("%d",&num);
for(i=2;i<num;i++)
{
j=num/i;
j=0?flag=TRUE:;
}
flag=TRUE?printf("Not Prime");printf("Prime");
}

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