当在范围内时，basic_string::replace上的异常超出范围，正如调试相同参数的输出所证明的那样

#include <iostream>
#include <string>

int main() {
    std::string str = "Hello, world!";
    std::cout << "原始字符串：" << str << std::endl;

    std::size_t startPos = 7;  // 替换的起始位置
    std::size_t replaceLen = 5;  // 替换的长度
    std::string replaceStr = "everyone";  // 替换的字符串

    // 判断替换的起始位置和替换的长度是否在字符串的范围内
    if (startPos <= str.size() && startPos + replaceLen <= str.size()) {
        str.replace(startPos, replaceLen, replaceStr);
        std::cout << "替换后的字符串：" << str << std::endl;
    } else {
        std::cout << "替换超出范围，无法执行替换操作。" << std::endl;
    }

    return 0;
}