题解 | #统计字符#

#include <stdio.h>

int checkAlp(char ch)
{
    if((ch >= 'a' && ch <= 'z') ||
    (ch >= 'A' && ch <= 'Z'))
        return 1;
    return 0;
}
int checkNum(char ch)
{
    if(ch >= '0' && ch <= '9')
        return 1;
    return 0;
}
int main() {
    char ch;
    int alp = 0, n_ = 0, num = 0, oth = 0;
    while(EOF != (ch = getchar()))
    {
        if(checkAlp(ch))
            alp++;
        else if(checkNum(ch))
            num++;
        else if(ch == ' ')
            n_++;
        else if(ch != '\n')
            oth++;
    }
    printf("%d\n%d\n%d\n%d",alp,n_,num,oth);
    return 0;
}