Ordinary function, the function pointer

Define a common function

　　int func_a (int, int); // function func_A two parameters of type int and returns an int

　　int func_a(int,int){   }

 

Define a pointer to the function

　　int (* func_b) (int, int); // pointer to function * func_b, two parameters are variables of type int and returns an int

　　int (*func_b)(int,int){  }

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Definition of a pointer

　　int * p;