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

int main (void)
{
    int number1, number2, goodcalc, usercalc, i, good, bad;
    srand(time(0));
    do {
        good = 0;
        number1 = rand() % 100;
        number2 = rand() % 100;
        goodcalc = number1 + number2;
        printf ("%d + %d = ", number1 , number2);
        scanf ("%d", &usercalc);
        if(usercalc == goodcalc)
        {
            good = good + 1;
            printf ("Good job!\n");
        }
        else
        {
            bad = bad + 1;
            printf ("Haha, loosen!\n");
        }
    } while(i < 1);
    printf ("Good : %d; Bad : %d.\n", good, bad);
    printf ("Want to restart? Yes = 0; No = 1.\n", &i);
    scanf ("%d", &i);
    return 0 ;
}