#include "stdio.h"
void main()
{
char c;
int letters=0,space=0,digit=0,other=0;
printf("请输入一行字符：\n");
while((c=getchar())!='\n')
{
if(c>='a'&&c<='z'||c>='A'&&c<='Z')
{
letters++;
}else if(c==' ')
{
space++;
}else if(c>='0'&&c<='9')
{
digit++;
}else
{
other++;
}
}
printf("字母数：%d\n空格数：：%d\n数字数：：%d\n其他数：：%d\n",letters,space,digit,other);
}