题解 | #计算某字符出现次数#

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

int main() {
    string str;
    getline(cin, str);
    char ch;
    cin >> ch;
    int cnt = 0;
    for (int i = 0; i < str.size(); i++) {

        if (str[i] == ch || str[i] == tolower(ch) || str[i] == toupper(ch))
            cnt++;
    }
    cout << cnt << endl;

}
// 64 位输出请用 printf("%lld")