Question

CODE:

#include <stdio.h>
main() {

    int nums[100], i;
    char answer;
    int count = 0;
    double avg;

    for (i = 0; i < 100; i++) {
        printf("Enter number %d: ", i + 1);
        scanf("%d", &nums[i]);
        printf("Another? ");
        scanf("%c", &answer);
        count += nums[i];
    }
}

RUN:

~> a.out
Enter number 1: 1
Another? Enter number 2: 2
Another? Enter number 3: 3
Another? Enter number 4: 4
Another? Enter number 5: 5
Another? Enter number 6: 6
Another? Enter number 7: 7
Another? Enter number 8: 8
Another? Enter number 9:

It’s supposed to ask me if I want to enter another number, but for some reason the scanf is not working. Also, I need to make it so that the user can enter 100 numbers, or any number under that, being prompted with a question of “do you want to enter another number”. If the answer is no, it terminates, if it is yes, it carries on.

Answer 1

Your first scanf leaves a newline in the buffer. It’s because %d ignores trailing blanks while %c doesn’t. Use this cheap trick to make the second scanf eat the blanks:

scanf(" %c", &answer);
       ^

The issue is common enough, you can read more about it in the C FAQ.