请各位懂C语言的朋友帮忙解解题目答:有点长 程序如下:include<stdio.h> main(){ int score[20],i=0,j=0,sum=0,average,max,min,t,A=0,B=0,C=0,D=0,E=0;printf("please input scores of 20 students:\n");for(i=0;i!=20;++i){ scanf("%d",&score[i]);sum=sum+score[i];switch(score[i]/10){ case 9...