function parameters in C

#define N 99
int setPasscode(int num1);
int randomPasscodeSearch(int num1, int code);

int main(void) {
    srand(time(NULL));
    setPasscode(N);
    randomPasscodeSearch(N, code);
}

int setPasscode(int num1) {
    int code = 0;
    num1 = N;
    for (int i = 0; i < 5; i++) {
        code = rand() % num1 + 1;
         if (i == 4) {
            printf("%d - %d\n", i, code);
         }
    }
    return code;
}