Question

write a program to accept a number and check whether its prime or not?

Answer 1

# include<iostream.h>
# include<conio.h>

//calculation
int isprime(int valuex)
{
int x,j;
x=1;
for (j=2 ; j<valuex; j++)
{ if ((valuex%j)==0) x=0; }
if(x!=0) return 1;
& else return 0;
}

void main(){
int isprime(int);
int value;

//input
cout<<"Enter a number to verify whether it is prime or not "<<endl;
cin>>value;

//output
if (isprime(value)==1) cout<<"Yes the number is prime"<<endl;
else cout<<"Sorry, not a prime"<<endl;
getch();
}