题解 | #计算某字符出现次数#

#include<iostream>
#include <map>

using namespace std;

int main(){
    string str;
    char c;
    getline(cin, str);
    cin >> c;

    map<char, int> mp;
    for(auto ch : str){
        mp[tolower(ch)]++;
    }

    cout << mp[tolower(c)] << endl;
    return 0;
}