Answer / ***..$indhu..***

#include<iostream.h>
#include<conio.h>
class prime
{
int n,i;
public:
void giveno(int);
void no_prime();
};
void prime::giveno(int a)
{
n=a;
}
void prime::no_prime()
{
i=2;
if(i<=n-1)
{
if(n%i==0)
{
cout<<endl<<"not prime no";
else
cout<<endl<<"prime no";
break;
}
if(n==i)
{
cout<<endl<<"prime no";
}
}
}
int main()
{
prime p1;
p1.giveno(5);
p1.no_prime();
return 0;
}

Answer / rakesh ranjan

#include<conio.h>
void main()
{
int a,i;
printf("enter the number ");
scanf("%d",&a);
for(i=2;i<a;i++)
if(a%i==0)
{
printf("number is not Prime");
break;
}
if(i==a)
printf("Prime number");
getch();
}

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