题解 | 统计字符

#include <iostream>
using namespace std;

int main() {
    string s;
    while (getline(cin, s)) {
        int alph = 0, space = 0, num = 0, other = 0;

        for (char c : s) {
            if (isalpha(c))
                alph++;
            else if (c == 32)
                space++;
            else if (isdigit(c))
                num++;
            else
                other++;
        }

        cout << alph << endl;
        cout << space << endl;
        cout << num << endl;
        cout << other << endl;
    }
}
// 64 位输出请用 printf("%lld")