C语言中switch结构的使用

C语言中switch结构的使用

因为case后面不能接范围，也就是说case后面是一个确实固定的常量.用下面的方法比较好，

#include
int main()
{
int code;

printf("输入成绩\n");

scanf("%d",&code);

if(code<=100&&code>=90) printf("A级\n");

else if(code<=89&&code>=80) printf("B级\n");

else if(code<=79&&code>=70) printf("C级\n");

else if(code<=69&&code>60) printf("D级\n");

else (code<60) printf("E级\n");

return 0;
}
你可以先把范围用字母或常量代替 ，再用switch语句追问if else的语句我会啊，但是我们老师要求我们用switch结构.....

#include 
void main ()
{
    int s=0,n=0;
    printf("__________________________ ");
    printf("Score differentiate system ");
    printf("-------------------------- ");
    printf("Give me the score of the student! ");
    printf("WARNING:Score between 0 and 100! ");
    printf("SCORE:");    scanf("%d",&s);
    while(s!=-1)
    {
        if (s<0||s>100)
        {
            printf("Warning:Illegal Scanf! ");
        }
        else
        {
            n=s/10;
            switch(n)
            {
            case 10 :
                printf("Range:A ");
                break;
            case 9  :
                printf("Range:A ");
                break;
            case 8  :
                printf("Range:B ");
                break;
            case 7  :
                printf("Range:C ");
                break;
            case 6  :
                printf("Range:D ");
                break;
            default:
                printf("Range:E ");
                break;
            }
        }
        printf("SCORE:");
        scanf("%d",&s);
    }
    system("pause");
}