统计字符

/*
 * 34.cpp
 *
 *  Created on: 2011-8-8
 *      Author: san
 */


# include <stdio.h>


int main(void)
{
//定义变量
char c;
int letters = 0;
int space = 0;
int digit = 0;
int others = 0;


//输入
printf("请输入：\n");
while ((c = getchar()) != '\n')
{
if (c>='a' && c<='z' || c>='A' && c<='Z')//统计字符
letters++;