第1个回答 2010-10-09
#include <stdio.h>
main()
{
int grade;
scanf("%d",&grade);
if(grade>=90)
cout<<'A';
else if(grade>=80 && grade<=89)
cout<<'B';
else if(grade>=70 && grade<=79)
cout<<'C';
else if(grade>=60 && grade<=69)
cout<<'D';
else if(grade<=59)
cout<<'E';
else
cout<<"error";
}