C language pointer to function

The main points of ： Define a function in a program , The compiler will convert the source code of the function into executable code and allocate the corresponding storage space . This storage space will have an address , The function name is the starting address . You can use a pointer to a function type , You can call a function by pointing to its starting address
Its definition format is as follows ：
float (*p)(float 1,float 2,…float n)
At this time P A pointer is a pointer that has n Parameters , The return value is float Function of type .

#include <stdio.h>
int main()
{
    
  float Max(float a ,float b);
  float a=2.1 ,b=3.3;
  float (*p)(float,float);
  p=Max;                  // Pointer to Max Function entry 
  // The entry of a function is also an address in physical storage , The function name represents its 
  // Initial address 
  printf(" The maximum number is ：%f",(*p)(a,b));

}
float Max(float a ,float b)
{
    

   return a>b?a:b;

}

Running results ： The maximum number is ：3.300000