#include <stdio.h>
#include <stdlib.h>


//determine if a number is prime by checking for factors lessthan the number
int main()
{
    int num;
    int counter;
    int res;
    //float div;
    
    printf("input a number: ");
    scanf("%d", &num);
    
    for(counter = 2; counter<num; counter++)
    {           
           //printf("remainder = %d\n", num%counter);
           if(num%counter==0)
           {
               printf("%d is a composite num\n", num);
               system("pause");
               exit(1);
           }     
    }
    
    printf("%d is prime\n", num);
    
    system("pause");
}