Basic steps for creating a static library

The directory you started to create is as follows ：

The files created are ：

• 1,pmath.h

  #ifndef P_MATH_H // Head file guard 
  #define P_MATH_H
  
  // Declaration of functions 
  int p_add (int x, int y);
  int p_sub (int x, int y);
  int p_mul (int x, int y);
  int p_div (int x, int y);
  
  #endif
  

• 2,p_add.c

  #include "pmath.h"
  
  int p_add (int x, int y)
  {
        
  	return x + y;
  }
  
  int p_sub (int x, int y)
  {
        
  	return x - y;
  }
  
  

• 3,p_mul.c

  #include "pmath.h"
  
  int p_mul (int x, int y)
  {
        
  	return x * y;
  }
  
  int p_div (int x, int y)
  {
        
  	return x / y;
  }
  

• 4,test.c

  #include "Imath/pmath.h"
  #include <stdio.h>
  int main (void)
  {
        
  	int a = 6, b = 2;
  	printf (" %d + %d = %d\n", a, b, p_add (a, b));
  	printf (" %d - %d = %d\n", a, b, p_sub (a, b));
  	printf (" %d * %d = %d\n", a, b, p_mul (a, b));
  	printf (" %d / %d = %d\n", a, b, p_div (a, b));
  	return 0;
  }
  

I created these four files in the same directory , So I need to put test.c Move to the parent directory .（ Of course, you can also create directly in the parent directory test.c ：）

Compile the file to be added to the static library into the target file . link .c File generation .o :

Add the target file to the static library （creating libImath）：

see ：

Use static library links to generate executable files and execute ：

Directory structure ：