*练习3-4 统计字符 (15 分)

#include<stdio.h>
int main()
{
	char a;
	int i;
	int letter=0,blank=0,digit=0,other=0;
	
	for(i=1;i<=10;i++){
		scanf("%c",&a);
		if((a>='a'&&a<='z')||(a>='A'&&a<='Z')){
			letter++;
		}//a-z;A-Z
		else if(a==' '||a=='\n'){
			blank++;
		}
		else if(a>='0'&&a<='9'){
			digit++;
		}
		else{
			other++;
		}
	}
	printf("letter = %d, blank = %d, digit = %d, other = %d",letter,blank,digit,other);
}