编辑代码

#include <stdio.h>
int main()
{
	int grade;
	scanf("%d",&grade);
	printf("Your score:");
	{
	if (grade>90&&grade<101) 
        printf("A\n");
	else if(grade>80&&grade<91) 
        printf("B\n");
	else if(grade>70&&grade<81)
        printf("C\n");
	else if(grade>60&&grade<71)
        printf("D\n");  
	else if(grade<=60)
        printf("E\n");;  
	}
	return 0;
}