Question

I can’t seem to find the bug, help: I’m trying to input n, followed by n integers. Then output these n integers’ median. n is odd and positive. n is less than 1 million.

Sample Input
5 37 28 21 44 49

Sample Output
37

#include <stdio.h>
#include <stdlib.h>
#define INTEGERS 6


int numbers[6];

int compare(const void * a, const void * b) {
    return ( *(int*) a - *(int*) b);
}

int main() {
    int n, i;

    for (i = 0; i < 6; i++) {
        printf("Enter numbers:");
        scanf("%d", numbers[i]);

    }

    qsort(numbers, INTEGERS, sizeof (int), compare);
    for (n = 0; n < INTEGERS; n++) {
        printf("%d ", numbers[n]);
    }
    printf("\n%d ", numbers[INTEGERS / 2]);
    return 0;
}

Answer 1

Scanf requires a memory address, not a value.

Try:

#include <stdio.h>
#include <stdlib.h>
#define INTEGERS 6


int numbers[INTEGERS];

int compare(const void * a, const void * b) {
    return ( *(int*) a - *(int*) b);
}

int main() {
    int n, i;

    printf("Enter numbers:");
    for (i = 0; i < INTEGERS; i++) {
        scanf("%d", &numbers[i]);
    }

    qsort(numbers, INTEGERS, sizeof (int), compare);
    for (n = 0; n < INTEGERS; n++) {
        printf("%d ", numbers[n]);
    }
    printf("\n%d ", numbers[INTEGERS / 2]);
    return 0;
}