题解 | #计算某字符出现次数#

#include <cctype>
#include <iostream>
#include <string>

using namespace std;

int main() {
    string s;
    getline(cin, s);

    char c;
    cin >> c;
    c = tolower(c);

    int num =0;
    for (int i =0; i <= s.size(); i ++) {
        s[i] = tolower(s[i]);
        if(s[i] == c) num++;
    }

     cout << num;
     return 0;
    
}
// 64 位输出请用 printf("%lld")