Composite Number

Composite Number is a number which have more than two factors.

Example 1: 4 have three factors (1,2,4). Hence it is a Composite Number.

Example 2: 12 have six factors (1,2,3,4,6,12). Hence it is a Composite Number.

C
#include <stdio.h>
void main()
{
    int n=0,flag=0;
    printf("Enter a number: ");
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    {
        if(n%i==0)
        {
            flag++;
        }
    }
    if(flag!=2)
    {
        printf("%d is a Composite Number",n);
    }
    else
    {
        printf("%d is not a Composite Number",n);
    }
}
C