能否为已编译的.o文件添加等效于getchar()的暂停功能？

Got it, let's sort out this frustrating problem where your compiled C program closes right after showing output—no source code needed. Here are three practical ways to make the window stay open so you can read your results:

1. Run the EXE from Command Prompt/PowerShell #

This is the simplest fix, no extra files required:

• Open Command Prompt (press Win+R, type cmd, hit Enter) or PowerShell.
• Navigate to the folder where your EXE is stored using the cd command. For example:

  cd C:\Users\YourName\Desktop\ProgramFiles
  

• Type the name of your EXE file (like myprogram.exe) and press Enter. The window will stay open after the program finishes, so you can see all output.

2. Create a Batch File to Wrap the EXE #

If you prefer double-clicking like before, make a batch file to add a pause after the program runs:

• Right-click in the same folder as your EXE, select "New > Text Document".
• Open the text file and paste these two lines (replace your_program.exe with your actual EXE name):

  your_program.exe
  pause
  

• Save the file, then rename it from New Text Document.txt to run_program.bat (make sure file extensions are visible so you can change .txt to .bat).
• Double-click the .bat file—your program will run, and after it finishes, the window will display "Press any key to continue . . ." so you can read the output.

3. Modify the EXE with a Debugger (Advanced) #

If you want a permanent fix without relying on batch files or command lines, you can patch the EXE to add a getchar() call before exiting. This needs basic reverse-engineering tools like x64dbg:

• Download and open x64dbg, then load your EXE.
• Find the end of the main function (look for the ret instruction that exits the program).
• Before that ret instruction, insert a call to getchar(). You'll need to locate the address of getchar from the program's imported functions.
• Save the modified EXE (use x64dbg's "Patch file" feature). Now the program will automatically pause before closing.

Note: The first two methods are perfect for quick use, while the third is better if you want a self-contained fix that works with double-clicks.

内容的提问来源于stack exchange，提问作者Neinstein