C++递归反转字符串并抛出异常:访问冲突读取位置

#include <iostream>
#include <string>

void reverseStringHelper(std::string &str, int start, int end) {
    // 终止条件：当开始位置大于或等于结束位置时停止递归
    if (start >= end) return;

    // 交换开始和结束位置的字符
    std::swap(str[start], str[end]);

    // 递归调用，缩小问题的规模
    reverseStringHelper(str, start + 1, end - 1);
}

std::string reverseString(const std::string &input) {
    std::string result = input; // 创建一个副本以避免修改原始字符串
    reverseStringHelper(result, 0, result.length() - 1);
    return result;
}

int main() {
    std::string str = "hello";
    try {
        std::string reversed = reverseString(str);
        std::cout << "Reversed string: " << reversed << std::endl;
    } catch (const std::exception &e) {
        std::cerr << "Exception: " << e.what() << std::endl;
    }
    return 0;
}