std::string was_slow_

Unfortunately, as an AI language model, I do not have access to the context in which "was_slow_" was used. It could be a variable name or part of a sentence, and without more information, I cannot provide a meaningful response. Please provide more context or information for me to assist you better.

相关问题

[Error] no matching function for call to 'std::basic_ofstream<char>::basic_ofstream(std::string&)'

This error occurs when the std::ofstream constructor is given a string argument instead of a character array (const char*) argument. To fix this error, you can pass the string argument as a c_str() of the string, like this:

std::string filename = "example.txt";
std::ofstream outfile(filename.c_str());

Alternatively, you can use the constructor that takes a std::string_view argument, which was introduced in C++17:

std::string filename = "example.txt";
std::ofstream outfile(std::string_view(filename));

优化以下代码：#include <iostream> #include <string> #include <chrono> #include <windows.h> void Slow_display(const std::string& a, int times) { for (auto t : a) { std::cout << t; Sleep(times); } } int main() { std::cout << "邀请函:\n\n\n"; Slow_display("6月11日我们将拍毕业照,欢迎您的参加。\n", 30); Slow_display("时间:2023年6月11日7:30 - 12:00\n", 100); std::cout << "地点:灯湖三小603班教室\n"; std::cout << "参与者:全班的同学和教过我们的老师们^_^\n\n\n"; Sleep(2000); Slow_display("期待您的参与!", 30); return 0; }

可以使用字符串流来代替字符一个一个输出，同时可以用std::this_thread::sleep_for代替Sleep函数，使用std::chrono::milliseconds来指定时间间隔。优化后的代码如下：

#include <iostream>
#include <string>
#include <sstream>
#include <chrono>
#include <thread>

void Slow_display(const std::string& a, int times) {
    std::stringstream ss(a);
    std::string line;
    while (std::getline(ss, line)) {
        for (auto t : line) {
            std::cout << t;
            std::this_thread::sleep_for(std::chrono::milliseconds(times));
        }
        std::cout << std::endl;
    }
}

int main() {
    std::cout << "邀请函:\n\n\n";
    Slow_display("6月11日我们将拍毕业照,欢迎您的参加。\n", 30);
    Slow_display("时间:2023年6月11日7:30 - 12:00\n", 100);
    std::cout << "地点:灯湖三小603班教室\n";
    std::cout << "参与者:全班的同学和教过我们的老师们^_^\n\n\n";
    std::this_thread::sleep_for(std::chrono::milliseconds(2000));
    Slow_display("期待您的参与!", 30);
    return 0;
}

优化后的代码更加清晰简洁，同时也更加可读和易于维护。