#include<stdio.h>
int main()
{
float score;
char *grade; //C语言存储字符串用指针或char数组，C++用string类型变量，并引用头文件string .string grade;grade="ABC";
printf("Please input a student’score: ");
scanf("%f", &score);
while (score > 100 || score < 0)
{
printf("\nInput error, try again!");
scanf("%f", &score);
}
switch ((int)(score / 10))
{
case 10:
case 9: grade = "A类";
break;
case 8: grade = "B类";
break;
case 7: grade = "C类";
break;
case 6: grade = "D类";
break;
case 5: grade = "E类";
break;
default:
grade = "E类";
}
printf("score is %f, score grade is %s.\n", score, grade);
return 0;
}
