题解 | 统计大写字母个数

#include <iostream>
#include <cctype>
using namespace std;

int main() {
    string s;
    getline(cin, s);
    int count = 0;
    for(int i = 0; i < s.size(); ++i) {
        if(isupper(s[i])) ++count;
    }
    cout << count << endl;
    return 0;
}