Enter a int vector and order it by desc

sorting_int_vector_by_desc.c

#include <stdio.h>

#define MAX 100

int defineMaxIndex();
void receiveNumbers(int nums[], int maxIndex);
void descSort(int nums[], int maxIndex);
void printVector(int nums[], int maxIndex);

int main()
{
	int nums[MAX];
	int maxIndex;

	maxIndex = defineMaxIndex();
	receiveNumbers(nums, maxIndex);
	descSort(nums, maxIndex);
	printVector(nums, maxIndex);
}

int defineMaxIndex() {
	int num = -1;

	while ((num < 0)||(num > 100)) {
		printf("\n Quantity: ");
		scanf("%d", &num);
	}

	return num;
}

void receiveNumbers(int nums[], int maxIndex) {
	int i;
	for (i = 0; i < maxIndex; i++) {
		printf("\n Number %d: ", i + 1);
		scanf("%d", &nums[i]);
	}
}

void descSort(int nums[], int maxIndex) {
	int i, j, aux;
	for (i = 0; i < maxIndex; i++) {
		for (j = i; j < maxIndex; j++) {
			if (nums[i] < nums[j]) {
				aux = nums[i];
				nums[i] = nums[j];
				nums[j] = aux;
			}
		}
	}
}

void printVector(int nums[], int maxIndex) {
	int i;

	printf("\n [ ");

	for (i = 0; i < maxIndex; i++) {
		if (i != (maxIndex - 1))
			printf("%d, ", nums[i]);
		else
			printf("%d ]\n", nums[i]);
	}
}