成绩转换#include<stdio.h>int main(){ int score; while((scanf("%d",&score))!=EOF) { if(90<=score&&score<=100) { printf("A\n"); } else if(80<=score&&score<=89) { printf("B\n"); } else if(70<=score&&score<=79) { printf("C\n"); } else if(60<=score&&score<=69) { printf("D\n"); } else if(0<=score&&score<=59) { printf("E\n"); } else if(score<0||score>100) { printf("Score is error!\n"); } } return 0;}