C: two-digit subtraction with function pointers

//

Main.c

Function_pointer

//

Created by Mac on 15/8/2.

Copyright (c) 2015 BJSXT. All rights reserved.

Requirements: The number of two integers by the function pointer to the and, difference, product, quotient.

Knowledge Point: A function pointer is a pointer to a function that completes the operation by pointing to the function to be called.

Remember: The function to be called must be the same as the declaration of the function pointer (includes: Return value type, number of arguments, and type)

#include <stdio.h>

int add (int, int);

int sub (int, int);

int mult (int, int);

int divi (int, int);

int main (int argc, const char * argv[])

{

Int (*p) (int,int); //define function pointers

p = add; //Pointer to the addition function

printf ("Add =%d\n", p (20,10));

p = Sub; //Pointer to subtraction function

printf ("Sub =%d\n", p (20,10));

p = mult; //Pointer to multiplication function

printf ("mult =%d\n", p (20,10));

p = divi; //Pointer to Division function

printf ("divi =%d\n", p (20,10));

return 0;

}

int add (int a,int b)

{

return a+b;

}

int sub (int a,int b)

{

return a-B;

}

int mult (int a,int b)

{

return a*b;

}

int divi (int a,int b)

{

return a/b;

}

C: two-digit subtraction with function pointers