#include"stdio.h"void main(){ int i,n,num; float sum = 0; printf("输入一个正整数:"); scanf("%d",&n); for (i = 1; i <=n; i++) { printf("输入第%d个整数:\n", i); scanf("%d",&num); sum = sum + num; } printf("%d个整数的平均数为:%.2f\n", n, sum/n);}