C 几个数的最值并求平均数问题

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问题：

Write a program that reads integers repeatedly and terminates when it reads 0

The program should display below information

• The range of input numbers 
• The average of input numbers (with 2 digits after the decimal point)

 

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

int num;
int max, min;
double average;
int i = 0;
int sum = 0;

int main(void) {
	
	while (1) {
		printf("Enter the number:");
		scanf_s("%d", &num);

		if (num == 0) {
			break;
		}

		if (num == 0) {
			max = num;
			min = num;
		}
		else {
			if (num > max) max = num;
			if (num < min) min = num;
		}

		i++;
		sum = sum + num;		

	}
	
	if (i != 0) {
		average = sum / i;
	}

	printf("User typed the numbers between %d and %d\n",min,max);
	printf("The average of input numbers is %.2f\n", average);
	system("pause");
	return 0;
}