题解 | #计算某字符出现次数#

#include <iostream>
#include <cstring>
#include <string>
using namespace std;

int main() {
    string str;
    char bit;

    getline(cin, str);
    //cout<<str<<endl;
    cin >> bit;
    //cout<<bit<<endl;
    int x=(int)'0';
    //cout<<x<<endl;

    int count = 0;
    for (int i = 0; i < str.size(); i++) {

        if (bit <=x+9 && bit >=x) {
            if (str[i] == bit)count++;
        } else {
            if (str[i] == bit || str[i] == bit + 32 || str[i] == bit - 32)

                count++;
        }


    }
    cout << count << endl;

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