//*** Introducing using of the functions ***
/*
 This program uses 2 functions:
 -The first one finds the maximom of the entered numbers.
 -The second one calculates the average of the numbers.
*/
#include <stdio.h>
#include <conio.h>
int findmax(int,int,int);
float average(int,int,int);
void main()
 {
 int x,y,z,m;
 float ave;
 clrscr();
 printf("Enter three integer numbers please:\n");
 scanf("%d%d%d",&x,&y,&z);
 m=findmax(x,y,z);
 ave=average(x,y,z);
 printf("The maximom of your numbers is %d\n",m);
 printf("The average of your numbers is %f\n",ave);
 printf("*** Checking the value of x inside the main function: %d",x);
 getch();
 }
//Defining the structure of the first function
int findmax(int a1, int a2, int a3)
 {
 int max;
 max=a1;
 if (max<a2)
	max=a2;
 if (max<a3)
	max=a3;
 return max;
 }
//Defining the structure of the second function
float average (int p1, int p2, int p3)
 {
 float x;
 /*
 Note that the variable x is defined in the main function before.
 Here, we can use it again without interfering with the 'x' defined in the main function.
 This means the variables are known only to their own funtions.
 In other words the variables defined in the body of a function, can only be used locally in the function.
 */
 x=(float)(p1+p2+p3)/3;
 return x;
 }