Write the c program to switch the 256 color graphics mode

Write the c program to switch the 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();
}

Write a c program to create a directory in current working directory?

#include<stdio.h>
#include<dos.h>
void main()
{
   union REGS i,o;
   i.h.ah=0x39;
   i.x.dx="ravan";
   int86(0x21,&i,&o);   
   getch();
}

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Write the c program to switch the 256 color graphics mode ?.

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