71: Write a program in C++ to list composite numbers from 1 to an upperbound.

 

// Write a program in C++ to list composite numbers from 1 to an upperbound. Go to the editor
//     Sample Output:
//     Input the upperlimit: 25
//     The composite numbers are:
//     4 6 8 9 10 12 14 15 16 18 20 21 22 24 25

#include <iostream>
using namespace std;
int main()
{
    int limit;

    cout << "\nInput an upperlimit: ";
    cin >> limit;

    cout << "\n**************************************************************\n\n";

    int a;
    cout << "The composite numbers upto " << limit << " are: \n";
    for (int i = 1; i <= limit; i++)
    {
        a = 0;
        for (int j = 1; j <= i; j++)
        {
            if (i % j == 0)
            {
                a++;
            }
        }
        if (a > 2)
        {
            cout << i << ' ';
        }
    }

    cout << "\n\n**************************************************************\n\n";

    return 0;
}


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