visual-studio - Visual Studio C++ Console调试过程中，有哪些手段可以将要输入的参数，事先存好读进去，而不用手工敲键盘输入

Question

Visual Studio C++ Console调试过程中，有哪些手段可以将要输入的参数，事先存好读进去，而不用手工敲键盘输入？

更新：提这个问题主要是好奇，那些OJ的系统，是怎么对代码进行评测的。
代码里都是cin这样的输入，那么OJ是怎样来用自己的case来评测这些代码是否正确呢？

Answer 1

Add header file fstream

at the beginning

#include<fstream>

Then, put the data you want to lose in in.txt, and add

in the code

std::ifstream cin("in.txt");

Just follow the normal usage of cin later.

Answer 2

Called through code, haha

Answer 3

Fill in the parameters you want to enter directly in the main function and that’s it. . .
There are many methods.

Answer 4

type yourtext.txt | yourexe.exe

Answer 5

An alternative, unit testing