【c语言】记录出错的结果题

#include<stdio.h>
void main(){
	
	int a[12] = {76,63,54,62,40,75,80,92,77,84,44,73};
	int b[4] = {60,70,90,101};
	int c[4] = {0};
	int i,j;
	for(i=0;i<12;i++){
		j=0;
		while(a[i]>=b[j])
			j++;
		c[j]++;
	
	}

	for(i=0;i<4;i++)
		printf("%d",c[i]);
	printf("
");


}

输出结果是3261