1. Decompress the downloaded mingw file to disk C and save it. After decompressing, open the bin file in mingw

2. Then copy the website of this computer, open my computer again, right click the blank, click Properties, then click advanced System Settings in the left column, and then click environment Variables in the lower right corner

3. After clicking the environment variable, click Path and edit it

4, click the right bar to create, and then paste the url copied in the second step, then click OK in the three dialog boxes.

5. After returning to the desktop, open the running box with Win +R and enter CMD to open the interface as shown below

6. Enter GCC -v and press Enter. If the following screen appears, the configuration is successful

7, then open VScode, open the program, search for three extension software as shown in the figure

8. After the installation is successful, restart the application, click New File, click file in the upper left corner to save as, add the · C suffix after the file name and save. Then enter the code and click “Run” as shown in the figure to see success

12 Job 1. Portability refers to the ability of C programs written on one system to run on other systems with little or no modification. If you need to change it, you can simply change a few items in the main program header file. 2. Source code files are files written by programmers in any language. Object code files and executables are made up of machine language instructions. But object code files only contain machine language code translated by the compiler for the code you write. Executable files also contain library functions used in the program you write and machine code to start the code. 3. Seven steps: define program goal > Design program > Write code > Edit > Run program – test and debug program – maintain and modify program 4. The task of the compiler is to convert the source code into executable code. 5. The task of the linker is to combine the object code you wrote, the standard startup code of the system, and the library code into a file, which can be executed.