Question

C++

All problems should be written in one main program. You have to test each function in the main program.

Problem 2: Write isPrime to test whether a parameter is prime. Apply the function in a program which prints all the prime numbers up to 40.

Answer 1

#include<iostream>
using namespace std;
bool isPrime (int n)
{
    int check = 0;
        // Check whether n is prime or not
        for(int j=2;j<=n/2;j++)//for loop
        {
            if(n%j==0)
            {
                 check = 1;
                 break;
             }
        }
        if(check==0)
            return true;
        else
            return false;
}
int main()
{
    int num;
    cout<<"Prime numbers upto 40 is:\n";
    for(int i=2;i<=40;i++)
    {
        if(isPrime(i))
        {
            cout<<i<<" ";
        }
    }

}