Create the header file "pointer.h" and define the methods of the following  functions using pointers as function parameters:

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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C programming

2. Create the header file "pointer.h" and define the methods of the following
 functions using pointers as function parameters:
 void areaCircle(int *radius, int *acirc)
 {
 /*compute the area of a circle and store the result to 
 the variable pointed by *acirc .*/
 }
 void circumCircle(int *radius,int *circumCircle)
 {
 /*compute the circumference of a circle andd store the result
 to the variable pointed by *circumCircle */
 }
 void diaCirc(int *radius, int diamCirc)
 {/*compute the diameter of a circle andd store the result
 to the variable pointed by *diamCirc */
 }
 void swap(int *a, int *b)
 {
 /* write methods that will swap the value of a and b, such that
 the value of a is b and b is a.
 Example: 
 Values of a and b BEFORE Values of a and b AFTER
 swap() swap()
 a=10 a=20
 b=20 b=10 */
 }
 void squareOrCube(int *x, int *result)
 {
 if the value of the variable pointed by x is ODD compute for the Square of 
 the number, where result=x * x. If it is EVEN compute for the cube of the
 number, where result= x*x*x */
 }

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