[problem solving] vs2019 solves the problem that the EXE file generated by compilation cannot be opened

Problem description

I am a college student majoring in computer , In use recently VS When doing big homework , Suddenly found the use of Release Compiled in mode exe Double click the file to flash back . I checked various methods on the Internet , The corresponding settings have also been modified , But it still doesn't work .

resolvent

Then I suddenly remembered my big homework and used ifstream Read in the file , To be read txt And cpp The files are in the same directory , Therefore, the relative address is used ！ That's why , So in VS No error was reported during debugging , And I didn't give an error prompt for file opening failure in the code , It's a waste of time . I threw up .
The modification method is ： The files to be read and exe Just put the files in the same folder .

summary

If you write C++ Generated by program compilation exe The file can't be opened , There can be the following solutions ：
1. stay main function return 0 with system(“pause”)（ In theory, we need <Windows.h> The header file , but VS2019 It seems that there is no need for ）
2. Modify the corresponding settings （ There are a lot of , Do not go into , In fact, I didn't remember too many changes myself ）
3. Consider whether it is possible that the flash back caused by program running error . For example, the above example , If the file fails to read in, it will exit the program directly .
Besides , If you use ifstream Read in the file , It is strongly recommended to judge whether the file was successfully opened , My usual way of writing is ：

	const char* path="in.txt";
	ifstream In(path);
	if(In.is_open()){
		...// Your operation 
	}
	else{
		cerr<<" File opening failure ！"<<endl;
		exit(-1);
	}
	In.close();

For dynamic memory applications , You can also refer to the above writing . Or use advanced try-catch How to write it .（ But I'm too good to ）
I hope I can think more and pay more attention to details in the future , I also hope you will not step on similar pits .