#include <stdio.h>
#include <string.h> 
void count(char c[]){
	int letters=0,space=0,digit=0,other=0;
	int i;
	for (i = 0; c[i]; i++)
	{
		if(c[i]>='a'&&c[i]<='z'||c[i]>='A'&&c[i]<='Z')
			letters++;
		else if(c[i]==' ')
			space++;
		else if(c[i]>='0'&&c[i]<='9')
			digit++;
		else
            	other++;
	}
	printf("字母数：%d\n空格数：%d\n数字数：%d\n其他字符数：%d",letters,space,digit,other);
}
int main(){
	char c[32];
	printf("请输入一行字符：\n");
	gets(c);
	count(c);
	return 0;
}
 

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