题解 | #计算某字符出现次数#

#include <iostream>
#include <string>

using namespace std;

int main() {
    std::string str;

    std::getline(cin, str);
    int iLen = str.size();
    char ch;
    std::cin >> ch;
    int iCount = 0;
    int iSpace = 'a' - 'A';
    for (int i = 0; i < iLen; i++) {
        if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') ) {
            if (str[i] == ch || std::abs(str[i] - ch) == iSpace) {
                iCount++;
            }
        } else {
            if (str[i] == ch) {
                iCount++;
            }
        }

        if (iCount > 1000) {
            break;
        }
    }
    std::cout << iCount << std::endl;

    return 0;
}