#include <stdio.h>

#define MAX_SIZE 20

void getNums(int[], int*);
int smallest(int[], int);

int main() {
	int numbers[MAX_SIZE];
	int count = 0;

	getNums(numbers, &count);
	printf("The smallest number is %d\n", smallest(numbers, count));

	return 0;
}

void getNums(int nums[], int* cnt) {
	int nextNum;

	printf("Enter numbers (end with -1): ");
	scanf("%d", &nextNum);
	while (nextNum != -1 && *cnt < MAX_SIZE) {
	    nums[*cnt] = nextNum;
		(*cnt)++;
		scanf("%d", &nextNum);
	}
}

int smallest(int nums[], int cnt) {
	int small = nums[0];
	int i; 
	for (i = 1; i < cnt; i++) {
		if (nums[i] < small) {
			small = nums[i];
		}
	}
	return small;
}