C语言习题统计学生成绩

#include <stdio.h>  
#include <math.h>
 
int main(){  
	int N;
	int i;
	int grade;
	int A=0,B=0,C=0,D=0,E=0;
	scanf("%d",&N);
	for(i=0;i<N;i++){
		scanf("%d",&grade);
		if(grade>=90){
			A++;
		}else if(grade>=80&&grade<90){
			B++;
		}else if(grade>=70&&grade<80){
			C++;
		}else if(grade>=60&&grade<70){
			D++;
		}else if(grade<60){
			E++;
		}	
	}
	printf("%d %d %d %d %d",A,B,C,D,E);
    return 0;  
 }