/* EXPERIMENT -  */
/* AIM : DEMONSTRATION OF CASE STRUCTURE USING ILLUSTRATION OF AREA OF
	 A TRIANGLE, CIRCLE, RECTANGLE AND SQUARE. */
		   /* PROGRAMMER : SHEKHAR A. SHERIKAR */

main()
{
 int c;
 unsigned long float a,b;
 clrscr();
 c=1;
 while(c!=0)
 {
  clrscr();
  printf("\n\n\t\tThis program will help you to find the areas of geometric");
  printf("\n\t\t        figures specified in the following menu : ");
  printf("\n\n\t\t\t\tM A I N -  M E N U");
  printf("\n\n\t\t\t\t    1.Triangle\n\t\t\t\t    2.Circle");
  printf("\n\t\t\t\t    3.Rectangle\n\t\t\t\t    4.Square");
  printf("\n\n\t\t     Type 0 to terminate the program and exit.");
  printf("\n\n\t\t      Enter your choice from the above menu : ");
  scanf("%d",&c);
  switch(c)
  {
   case 1: printf("\n\n\t\t\tEnter the height of the triangle : ");
	   scanf("%lf",&a);
	   printf("\n\t\t\tEnter the base of the triangle : ");
	   scanf("%lf",&b);
	   printf("\n\n\t\t\t\t- A N S W E R -\n");
	   printf("\n\t\tArea of the triangle is %f square units.",0.5*a*b);
	   printf("\n\n\t\t\tPress any key to continue...");
	   getch();
	   break;
   case 2: printf("\n\n\t\t\tEnter the radius of the circle : ");
	   scanf("%lf",&a);
	   printf("\n\n\t\t\t\t- A N S W E R -\n");
	   printf("\n\t\tArea of the circle is %f square units.",3.1428*a*a);
	   printf("\n\t\t\t    Press any key to continue...");
	   getch();
	   break;
   case 3: printf("\n\n\t\tEnter length of one side of the rectangle : ");
	   scanf("%lf",&a);
	   printf("\n\t\tEnter length of other side of the rectangle : ");
	   scanf("%lf",&b);
	   printf("\n\t\tArea of the rectangle is %f square units.",a*b);
	   printf("\n\n\n\t\t\tPress any key to continue...");
	   getch();
	   break;
   case 4: printf("\n\n\t\tEnter the length of any one side of the square : ");
	   scanf("%lf",&a);
	   printf("\n\t\tThe area of the square is %f square units.",a*a);
	   printf("\n\n\n\t\t\tPress any key to continue...");
	   getch();
	   break;
   case 0: clrscr();
	   printf("\n\n\n\n\n\n\n\t\t\t\tPROGRAM TERMINATED !");
	   printf("\n\n\n\t\t\tPress any key to return to source file...");
	   getch();
	   break;
   default:clrscr();
	   printf("\n\n\n\n\n\n\n\t\t\t\tINVALID INPUT ! ");
	   printf("\n\n\n\t\t\t  Press any key to try again...");
	   getch();
	   break;
  }
 }
}