题解 | #统计字符#

#include <stdio.h>
#include <string.h>

int main() {
    char str[1000];
    fgets(str, 1002, stdin);
    int len = strlen(str);

    int a = 0, b = 0, c = 0, d = 0; 

    for (int i = 0; i < len - 1; i++) {

        if ((str[i] >= 'A' && str[i] <= 'Z') || (str[i] >= 'a' && str[i] <= 'z')) {
        a++;
        }
        else if (str[i] == ' ') {
        b++;
        }
        else if (str[i] >= '0' && str[i] <= '9') {
        c++;
        }
        else {
        d++;
        }
    }
        printf("%d\n%d\n%d\n%d\n", a, b, c, d);
    
    return 0;
}