Help me to write a C program to switch the 256 color graphics mode?

Question

Write java program that deal with different shapes. Shapes mean geometry shapes i.e. circle, rectangle, square, and triangle.

Circle: radius
Rectangle: height and width
Square: height
Triangle: base and height

All shapes have area but each shape has specific way for calculating the area:

Circle: ½ pie square *radius
Rectangle: height * width
Square: height * height
Triangle: ½ base *height

Finally, in the main program
1. Define all different kinds of shapes
2. Call Area method for all objects and print result .

Answer 1

Here is the code to switch 256 color graphics mode:

#include<stdio.h>
#include<dos.h>
void main()
{
   int x,y,b;
   union REGS i,o;
   i.h.ah=0;
   i.h.al=0x13;
   int86(0x10,&i,&o);   
   getch();
}