Thread: Arrays and Loops

Hi im very new to C programming and I was writing a program to generate two random numbers who's answer the user has to guess, and the program will tell if the answer is right or wrong. While I have managed to do that, I have no clue how to produce a list of 10 random multiplication questions the user has to guess. Here is the code so far:

Code:

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

int main(void) {
int n1, n2;
long prd, guess;

srand((unsigned int)time(NULL));

n1 = 1 + (int)(100.0 * (rand() / (RAND_MAX + 1.0)));
n2 = 1 + (int)(100.0 * (rand() / (RAND_MAX + 1.0)));
prd = n1 * n2;

printf("What is the product of %d and %d\?\n"
"[Enter -1 to exit]\n", n1, n2);

if(scanf("%ld", &guess) != 1) {
puts("Incorrect input.");
return EXIT_FAILURE;
}
else if(guess == -1) {
puts("bye.");
}
else if(guess == prd) {
puts("Correct!");
}
else {
puts("Wrong guess.");
}
return 0;
}

I know to generate a list I have use loops and arrays but I'm completely clueless about it.

Read some tutorials. Give it a shot and come back with your attempt.