Notes for using IDE To write C language programs, ide to write C Language Programs

Notes for using IDE To write C language programs, ide to write C Language Programs

  I am a cainiao who likes programming. During the course of self-study, I have some questions and confusions. Although I have some experience, I will forget it for a long time, it is not conducive to the accumulation of knowledge. Therefore, I want to record my learning experience through the blog Park platform. I also want to consult with many experts.

 

I recently learned the C language, mainly using C-Free. In the course of learning, I found that the C language must follow a certain writing method, But the strange thing is that it can also be compiled without such writing.

Run the following code:

1 #include <stdio.h>
  2 
  3 struct point / * define structure * /
  4 {
  5 int x;
  6 int y;
  7};
  8 
  9 int main (int argc, char * argv [])
10 {
11 struct point A;
12 A.x = 2;
13 A.y = 3;
14 printf ("The coordinates of point A are: [% d,% d] \ n", A.x, A.y);
15 return 0;
16} 

As mentioned in the book: Line 1 must be written as struct point A rather than point. However, the compilation was successful, and later it was tested with VC ++ 6.0. Because I read two books at the same time for self-study, both of them are written in this way, and I believe the books should be correct. After several attempts, it is found that the default file extension is incorrect.

  C-Free and VC ++ 6.0 are compiled based on the source file extension. If the source file extension is. c, it is considered as the C language source file for compilation; if the source file extension is. cpp, it is considered as the c ++ source file for compilation.C-Free and VC ++ 6.0 default source file extensions are. cpp, the compiler is regarded as a C ++ source file for compilation, and C ++ allows the keyword struct to be omitted when declaring a struct, so compilation can be successful.

If you change the source file extension to. c when saving the file, or modify the default extension, the c language source file will be compiled. The keyword struct cannot be omitted in C language, so an error is prompted during compilation. So,When learning c language, you should set the default extension of IDE to. c, or save it as a. c file before compiling to avoid unnecessary confusion.