9 C

问题描述：
任意给定一个字符串，字符串中包含除了空格、换行符之外的的任意字符。你的任务是统计出现在该字符串中的各字母（即“A—Z”，“a—z”）的个数(区分大小写)。

输入与输出要求：
输入一个长度不超过100的非空字符串。字符串中不会出现空格、换行符。输出字符串中出现的字母的统计信息，每个字母的统计信息占一行，按照字母的ASCII码的顺序输出。

程序运行效果：
AAAsdf&^%DF879as↙
The character A has presented 3 times.↙
The character D has presented 1 times.↙
The character F has presented 1 times.↙
The character a has presented 1 times.↙
The character d has presented 1 times.↙
The character f has presented 1 times.↙
The character s has presented 2 times.↙
注意单词“time”不论单复数，一律输出复数形式“times”。

#include<stdio.h>
int main() {
	char a[100];
	scanf("%s",a);
	int i,k;
	int b[80]={0};
	for(i=0;a[i]!='\0';i++){
		k=a[i]-'0';
		b[k]++;
	}
	for(i=17;i<75;i++){
		if(i>42&&i<49) continue;
		//17-42为A-Z，49-74为a-z 
		if(b[i]!=0){
			printf("The character %c has presented %d times.\n",i+'0',b[i]);
		}
	}
	return 0;
}