Ŀ

գҪıйص䡣
һ repeat (0<repeat<10) repeat 㣺
弶Ƴɼ(AE)ӦİٷƳɼ(0100)䣬Ҫʹswitch䡣
弶ƳɼӦİٷƳɼΪA(90-100)B(80-89)C(70-79)D(60-69)E(0-59),벻ȷĳɼʾ"Invalid input"
ʹ䣺
printf("90-100\n"); 
printf("80-89\n"); 
printf("70-79\n"); 
printf("60-69\n");
printf("0-59\n");
printf("Invalid input\n");

ʾ˵

6ABCDEj   	(repeat=6弶ɼֱΪABCDEЧַj) 

90-100
80-89
70-79
60-69
0-59
Invalid input  	(ݲϷ)



#include <stdio.h>
int main(void)
{
    char ch;
    int repeat, ri;

    scanf("%d", &repeat);
    for(ri = 1; ri <= repeat; ri++){
        ch = getchar();    
/*---------*/
    }
}