quiz for prime number and sum of entered number

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

int main() {
    int num,i,j,c, sum = 0;

    printf("please enter the number = ");
    scanf("%d",&num);

    for (j=1;j<=num;j++){
        for (i=1,c=0;i<=j;i++){
            if (j%i==0){
                c++;
            }
        }
        if (c==2){
             printf("%d\n",j);
             sum = sum + j;
        }
    }

    printf("The sum = %d", sum);

    return 0;
}