#include<stdio.h>#include<stdlib.h>int main(){double score;int level;printf("请输入成绩:\n"); scanf("%lf",&score); if (score>100||score<0){ printf("成绩输入错误！\n");} else { level=(int)((score-50)/10); switch(level) { case 5: printf("优\n");break; case 4: printf("优\n");break; case 3: printf("良\n");break; case 2: printf("中\n");break; case 1: printf("差\n");break; default: printf("劣\n");break; } } return 0;}这个为什么运行的是繁体字啊，在线等答案