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#include <iostream>
#include <iomanip>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char** argv) {
cout<<"请输入成绩:"<<endl;
float score;
char str;
cin>>score;
int a=score/10;
switch(a){
case 10:
case 9:str='A';break;
case 8:str='B';break;
case 7:str='C';break;
case 6:str='D';break;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:str='E';break;
}
cout<<"您的成绩等级为:"<<str<<endl;
return 0;
}
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打码不容易望采纳谢谢。。。