//统计字符

#include<stdio.h>
int main(){
    int digit,letter,other;
    char ch;
    int i;
    digit=letter=other=0;
    printf("Enter 10 characters:");
    for(i=1;i<=10;i++){
        ch=getchar();
        if((ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z'))
        letter++;
        else if(ch>'0'&&ch<'9')
        digit++;
        else other++;
    }
    printf("letter=%d,digit=%d,other=%d\n",letter,digit,other);
    return 0;
}

#include<stdio.h>
int main(){
    int blank,digit,i,other;
    char ch;
    blank=digit=other=0;
    printf("Enter 10 characters:");
    for(i=1;i<=10;i++){
        ch=getchar();
        switch(ch){
            case ' ';
            case '\n';
            blank++;
            break;
            case '0';case '1';case '2';case '3';case '4';case '5';
            case '6';case '7';case '8';case '9';
            digit++;
            break;
            default;
            other++;
            break;
        }
    }
    printf("blank=%d,digit=%d,other=%d\n",blank,digit,other);
    return 0;
}