Pointer variable pointing to the function in C Language

Pointers in C language are an important data type in C language. They can not only point to int, char, char [], but also to functions.

# Include <stdio. h> // defines an addition int sum (int a, int B) {return a + B;} // defines a subtraction int minus (int a, int B) {return a-B;} // defines a method containing the pointer to a function. int count (int a, int B, int (* p) (int, int )) {return (* p) (a, B); // or return p (a, B) can also} int main () {// The function name is the address of the function, therefore, you can call printf ("% d \ n", count (10, 10, sum); printf ("% d \ n", count (10, 10, minus) as follows )); return 0 ;}

 

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