定义一个长度为20的整型数组答:include<stdio.h> int main(){ int i,k=0;float sum=0;float ave;int max,maxi;int min,mini;int a[20]={12,3,9,46,913,3,8,3,9,1,10,87,135,198,18,93,913,31,78,13};max=min=a[0];maxi=mini=0;for(i=0;i<20;i++){ if(a[i]<min){ min=a[i];mini=i;} ...