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C++ Program-Working with constant using #define preprocessor

Profile Photo Salim Ahmed Ansari
12/01/2017 0 View Comments0

//Header Files

#include
#include

// using #define preprocessor for defining a constant
#define len 10
#define br  5
#define rad 3
#define NEWLINE '\n'

//Main function

void main()
{
 int area_r;
 float area_c;

//Function for clearing screen
 clrscr();

 area_r=len*br;
 cout<<"Area of rectangle:"<<area_r;
 cout<< NEWLINE;

 area_c=3.14*rad*rad;
 cout<<"Area of circle:"<< area_c;

//Function for holding screen until any key is pressed

 getch();

}

 

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