如何将输出对齐到屏幕中心 - C++？
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How to align output to center of screen - C++?
提问by ashu
I am working on a C++ console app. I want to execute and print all the stuffs at the center of app window screen ( horizontally + vertically) as shown below.
我正在开发 C++ 控制台应用程序。我想在应用程序窗口屏幕中心（水平+垂直）执行和打印所有内容，如下所示。
--------------------------------
| |
| |
| User : xyz |
| Pass : **** |
| |
| |
--------------------------------
I want to run my whole program as how above. Is there any way to do so? Any help or suggestion would be appreciated.
我想按照上面的方式运行我的整个程序。有什么办法吗？任何帮助或建议将不胜感激。
采纳答案by Losiowaty
If you want to keep your application in a console, but want to do some layouts I'd recommend using ncursesas it gives you more control on where you print, and also gives you a possibility to create menus, message boxes and other GUI-like stuff.
如果您想将应用程序保留在控制台中，但想要进行一些布局，我建议您使用ncurses，因为它可以让您更好地控制打印位置，还可以让您创建菜单、消息框和其他 GUI-喜欢的东西。
回答by Boris
Example for WIN:
赢的例子：
#include <windows.h>
int main()
{
HANDLE screen = GetStdHandle( STD_OUTPUT_HANDLE );
COORD max_size = GetLargestConsoleWindowSize( screen );
char s[] = "Hello world!";
COORD pos;
pos.X = (max_size.X - sizeof(s) ) / 2;
pos.Y = max_size.Y / 2;
SetConsoleCursorPosition( screen, pos );
LPDWORD written;
WriteConsole( screen, s, sizeof(s), written, 0 );
return 0;
}
回答by Mark Garcia
How about this (LIVE EXAMPLE):
这个怎么样（现场示例）：
#include <iostream>
#include <string>
#include <vector>
void centerify_output(std::string str, int num_cols) {
// Calculate left padding
int padding_left = (num_cols / 2) - (str.size() / 2);
// Put padding spaces
for(int i = 0; i < padding_left; ++i) std::cout << ' ';
// Print the message
std::cout << str;
}
int main() {
std::vector<std::string> lines = {
"---------------------------------",
"| |",
"| |",
"| User : xyz |",
"| Pass : **** |",
"| |",
"| |",
"---------------------------------",
};
int num_cols = 100;
// VIRTUAL BORDER
std::cout << std::endl;
for(int i = 0; i < num_cols; ++i) std::cout << ' ';
std::cout << '|' << std::endl;
// OUTPUT
for(int i = 0; i < lines.size(); ++i) {
centerify_output(lines[i], num_cols);
std::cout << std::endl;
}
// VIRTUAL BORDER
std::cout << std::endl;
for(int i = 0; i < num_cols; ++i) std::cout << ' ';
std::cout << '|' << std::endl;
}
You get the idea. When centering the output vertically, you just put padding end lines at the top of the console.
你明白了。当垂直居中输出时，您只需在控制台顶部放置填充结束线。
