[Help] C Programming

void india();
void england();
void usa();
void australia();

void main()
{
printf(" i am in main");
india();
printf("jus got back from india!.......finally here...what a ride");
}

void india()
{
printf("im in india! ");
england();
printf("jus got back from england.....!");
return;
}

void england()
{
printf("im in england.......the queen aint hot!");
usa();
printf("jus got back from usa");
return;
}

void usa()
{
printf("im in usa......so whats so great bout this place?pathetic!");
australia();
printf("got back from australia");
return;
}

void australia()
{printf("lost in the outbacks!.....gotta find myself way back");
return;
}

while (TRUE)
{
   some code.... ;
  for (x=1; x<=20; x++)
  {
     some code .... ;
  }
}

Sum1 = Add3Numbers(23,12,34);
Sum2 = Add3Numbers(num1,num2,num3);

int Add3Numbers (int a, int b, int c)
{
  int total;
  total = a + b + c;
  return (total);
}

for(i=1,j=0;i<6;i=i+2,j=j+2)
{
scanf("%d",&data);
if(data%2!=0)
a[i]=data;
else
a[j]=data;
}

i=0;
j=1;
while(i<=20&&j<=19)
{
scanf("%d",&data);
if(data%2!=0)
{
a[j]=data;
j=j+2;
}
else
{a[i]=data;
i=i+2;
}
}

main()
{
int a[20],i,j,temp;
printf("Enter a Number Please\n");
for(i=0,j=1;i<20,j<20;i=i+2,j=j+2)
{
temp=getch();
if(temp%2=='0')
{
a[i]=temp;
}
else
{
a[j]=temp;
}

int caps(cmd)
/*cmd = 0 turns it off
  cmd = 1 turns it on
  cmd = 2 returns current status*/
int cmd;
{
     int far *capstat = 0x417;
     int state;
     state = *capstat & 64;
     if ( cmd == 2 )   /* just return the current status */
     {
          if ( state == 64 )
               return(1);
          else
               return(0);
     }
     if ( cmd == 0 )  /* if on, turn it off */
     {
          if ( state == 64 )
               *capstat = *capstat - 64;
          return(0);
     }
     if ( cmd == 1 ) /* if off, turn it on */
     {
          if ( state != 64 )
               *capstat = *capstat + 64;
          return(1);
     }
}

int num(cmd)
/*cmd = 0 turns it off
  cmd = 1 turns it on
  cmd = 2 returns current status*/
int cmd;
{
     int far *numstat = 0x417;
     int state;
     state = *numstat & 32;
     if ( cmd == 2 )   /* just return the current status */
     {
          if ( state == 32 )
               return(1);
          else
               return(0);
     }
     if ( cmd == 0 )  /* if on, turn it off */
     {
          if ( state == 32 )
               *numstat = *numstat - 32;
          return(0);
     }
     if ( cmd == 1 ) /* if off, turn it on */
     {
          if ( state != 32 )
               *numstat = *numstat + 32;
          return(1);
     }
}

int scrolock(cmd)
/*cmd = 0 turns it off
  cmd = 1 turns it on
  cmd = 2 returns current status*/
int cmd;
{
     int far *scrolstat = 0x417;
     int state;
     state = *scrolstat & 16;
     if ( cmd == 2 )   /* just return the current status */
     {
          if ( state == 16 )
               return(1);
          else
               return(0);
     }
     if ( cmd == 0 )  /* if on, turn it off */
     {
          if ( state == 16 )
               *scrolstat = *scrolstat - 16;
          return(0);
     }

     if ( cmd == 1 ) /* if off, turn it on */
     {
          if ( state != 16 )
               *scrolstat = *scrolstat + 16;
          return(1);
     }
}

int insert(cmd)
/*cmd = 0 turns it off
  cmd = 1 turns it on
  cmd = 2 returns current status*/
int cmd;
{
     int far *insertstat = 0x417;
     int state;
     state = *insertstat & 128;
     if ( cmd == 2 )   /* just return the current status */
     {
          if ( state == 128 )
               return(1);
          else
               return(0);
     }
     if ( cmd == 0 )  /* if on, turn it off */
     {
          if ( state == 128 )
               *insertstat = *insertstat - 128;
          return(0);
     }
     if ( cmd == 1 ) /* if off, turn it on */
     {
          if ( state != 128 )
               *insertstat = *insertstat + 128;
          return(1);
     }
}

void clrkeybuff()
{
     int istherech = 1, dummy;
     while ( istherech != 0 )
     {
          istherech = bioskey(1);
          if ( istherech != 0 )
               dummy = bioskey(0);
     }
}

/***********************************************************
*
*   key_code.h
*
*   Header file containing Scan Codes
*
*   (c) Copyright all C programmers, 1994.
*   All Rights Reserved.
*
*   This file released under GNU/GPL on 31st Mar '05
*   File released by tuxfan @ Digit Forums
*
************************************************************/

#define ESC        0x1b
#define ENTER      0xd
#define TAB        0x09
#define SHIFT_TAB  0x0f
#define PGUP       0x49
#define PGDN       0x51
#define UPARROW    0x48
#define DNARROW    0x50
#define LEFTARROW  0x4b
#define RIGHTARROW 0x4d
#define HOME       0x47
#define END        0x4f
#define BACKSPACE  0x08
#define INSERT     0x52
#define DELETE     0x53
#define NUM_PAD_5  0x4c   /*  with Num Lock off  */

#define CTRL_ENTER 0xa
#define CTRL_TAB   0x94
#define CTRL_PGUP  0x84
#define CTRL_PGDN  0x76
#define CTRL_UP    0x8d
#define CTRL_DN    0x91
#define CTRL_RIGHT 0x74
#define CTRL_LEFT  0x73
#define CTRL_HOME  0x77
#define CTRL_END   0x75
#define CTRL_BKSP  0x7f
#define CTRL_INS   0x92
#define CTRL_DEL   0x93

#define ALT_ENTER  0x1c
#define ALT_TAB    0xa5
#define ALT_PGUP   0x99
#define ALT_PGDN   0xa1
#define ALT_UP     0x98
#define ALT_DN     0xa0
#define ALT_LEFT   0x9b
#define ALT_RIGHT  0x9d
#define ALT_HOME   0x97
#define ALT_END    0x9f
#define ALT_BKSP   0xe
#define ALT_INS    0xa2
#define ALT_DEL    0xa3

#define F1         0x3b
#define F2         0x3c
#define F3         0x3d
#define F4         0x3e
#define F5         0x3f
#define F6         0x40
#define F7         0x41
#define F8         0x42
#define F9         0x43
#define F10        0x44
#define F11        0x85
#define F12        0x86

#define SHIFT_F1   0x54
#define SHIFT_F2   0x55
#define SHIFT_F3   0x56
#define SHIFT_F4   0x57
#define SHIFT_F5   0x58
#define SHIFT_F6   0x59
#define SHIFT_F7   0x5a
#define SHIFT_F8   0x5b
#define SHIFT_F9   0x5c
#define SHIFT_F10  0x5d
#define SHIFT_F11  0x87
#define SHIFT_F12  0x88

#define CTRL_F1    0x5e
#define CTRL_F2    0x5f
#define CTRL_F3    0x60
#define CTRL_F4    0x61
#define CTRL_F5    0x62
#define CTRL_F6    0x63
#define CTRL_F7    0x64
#define CTRL_F8    0x65
#define CTRL_F9    0x66
#define CTRL_F10   0x67
#define CTRL_F11   0x89
#define CTRL_F12   0x8a

#define ALT_F1     0x68
#define ALT_F2     0x69
#define ALT_F3     0x6a
#define ALT_F4     0x6b
#define ALT_F5     0x6c
#define ALT_F6     0x6d
#define ALT_F7     0x6e
#define ALT_F8     0x6f
#define ALT_F9     0x70
#define ALT_F10    0x71
#define ALT_F11    0x8b
#define ALT_F12    0x8c

#define ALT_A      0x1e
#define ALT_B      0x30
#define ALT_C      0x2e
#define ALT_D      0x20
#define ALT_E      0x12
#define ALT_F      0x21
#define ALT_G      0x22
#define ALT_H      0x23
#define ALT_I      0x17
#define ALT_J      0x24
#define ALT_K      0x25
#define ALT_L      0x26
#define ALT_M      0x32
#define ALT_N      0x31
#define ALT_O      0x18
#define ALT_P      0x19
#define ALT_Q      0x10
#define ALT_R      0x13
#define ALT_S      0x1f
#define ALT_T      0x14
#define ALT_U      0x16
#define ALT_V      0x2f
#define ALT_W      0x11
#define ALT_X      0x2d
#define ALT_Y      0x15
#define ALT_Z      0x2c

#define CTRL_A     0x1
#define CTRL_B     0x2
#define CTRL_C     0x3
#define CTRL_D     0x4
#define CTRL_E     0x5
#define CTRL_F     0x6
#define CTRL_G     0x7
#define CTRL_H     0x8
#define CTRL_I     0x9
#define CTRL_J     0xa
#define CTRL_K     0xb
#define CTRL_L     0xc
#define CTRL_M     0xd
#define CTRL_N     0xe
#define CTRL_O     0xf
#define CTRL_P     0x10
#define CTRL_Q     0x11
#define CTRL_R     0x12
#define CTRL_S     0x13
#define CTRL_T     0x14
#define CTRL_U     0x15
#define CTRL_V     0x16
#define CTRL_W     0x17
#define CTRL_X     0x18
#define CTRL_Y     0x19
#define CTRL_Z     0x1a

#define PLUS       0x2b
#define MINUS      0x2d

#define TRUE       1
#define FALSE      0
#define AND        &&
#define OR         ||

//this program prints the corresponding Ascii value or scan code of the key 
//that is being pressed. Press ESC to quit.

#define ESC 27
int main()
{
	char ch;
	do
	{
		ch=getch();
		if(ch==0) //that is no ascii code
		{
			ch=getch();
			printf("\nScan Code is %d",ch);
		}
		else
			printf("\nAscii Code is %d",ch);

	}
	while(ch!=ESC); //loop until ESC key is pressed
}

//Mouse Functions

#include<dos.h>

#define MOUSE_LEFT   1
#define MOUSE_RIGHT  2
#define MOUSE_BOTH   3

//prototypes

/*int initmouse();
void show_mouseptr();
void mouse_window(int x1,int y1,int x2,int y2);
void hide_mouse();
void mouse_status(int *x_ptr,int * y_ptr,int * button);
void set_mousecursor_to(int x,int y);
void button_press(int button,int *status,int *presses,int *x,int *y);
void button_release(int button,int *status,int *presses,int *x,int *y);
*/

int initmouse() //use this function to initialize mouse
{
	union REGS in,out;
	in.x.ax=0;
	int86(0x33,&in,&out);
	return out.x.ax;
}

void show_mouseptr() //this will show the mouse pointer
{
	union REGS in,out;
	in.x.ax=1;
	int86(0x33,&in,&out);
}

//this will define the window (don't need to use unless u need to restrict 
//the mouse pointer to some area

void mouse_window(int x1,int y1,int x2,int y2)
{
	union REGS in,out;
	in.x.ax=0x07;
	in.x.cx=x1;
	in.x.dx=x2;
	int86(0x33,&in,&out);
	in.x.ax=0x08;
	in.x.cx=y1;
	in.x.dx=y2;
	int86(0x33,&in,&out);
}

//use this to hide mouse
//before drawing or changing screen contents use this function to hide
//mouse pointer, and then show it using show_mouseptr()

void hide_mouse()
{
	union REGS in,out;
	in.x.ax=0x2;
	int86(0x33,&in,&out);
}


//this will show the mouse cursor in (x,y) position
void set_mousecursor_to(int x,int y)
{
	union REGS in,out;
	in.x.ax=0x4;
	in.x.cx=y;
	in.x.dx=x;
	int86(0x33,&in,&out);
}

//get the current mouse status
//including button information and screen location

void mouse_status(int *x_ptr,int *y_ptr,int *button)
{
	union REGS in,out;
	in.x.ax=0x3;
	int86(0x33,&in,&out);
	*x_ptr=out.x.cx/8;
	*y_ptr=out.x.dx/8;
	*button=out.x.bx;

}



//This is a demo. To include mouse functions in ur programs comment the main()
//function, and include this file eg: #include "mouse.c"

int main()
{
	int button,presses,status,x,y,flag=0;
	initmouse();
	clrscr();
	//show mouse pointer;
         show_mouseptr();
	while(1) 
	{
		
		if(bioskey(1)) //If any key is pressed
		{
			char ch=getch();
			if(ch==27) break;  //if itis the esc key then quit
		}

		mouse_status(&x,&y,&button);
		if(button & MOUSE_LEFT) //if Left button is down
		{
			if(!flag) printf("\n Mouse down at (%d,%d)",x,y);
			flag=1;

		}
		else
		{
			if(flag)  //or if (flag==1)
			{
				flag=0;
				printf("\n Mouse Up at (%d,%d)",x,y);
			}
		}
	}
}

union  REGS i,o;
struct SREGS s;

// Some mouse pointer shapes

int cursor[][32]={
  /*cursor1*/
  0x0010,0x0010,0x0010,0x0010,
  0x0010,0x0010,0x0010,0x0010,
  0x0010,0x0010,0x0010,0x0010,
  0x0010,0x0010,0x0010,0x0010,
  0x0010,0x0010,0x0010,0x0010,
  0x0010,0x0010,0x0010,0x0010,
  0x0010,0x0010,0x0010,0x0010,
  0x0010,0x0010,0x0010,0x0010,
  /*cursor2*/
  0xff00,0xff00,0xff00,0xff00,
  0x1234,0x1234,0x1234,0x1234,
  0x0000,0x0010,0x0010,0x0000,
  0x0000,0x0010,0x0010,0x0000,
  0x0010,0x0000,0x0000,0x0000,
  0x1234,0x0034,0x0034,0x1234,
  0x5678,0x5789,0x5789,0x5678,
  0x99ff,0x9a0f,0x9a0f,0x99ff,
  /*cursor3*/
  0x0000,0x0000,0x0000,0x0000,
  0x0000,0x0000,0x0000,0x0000,
  0x0000,0x0000,0x0000,0x0000,
  0x0000,0x0000,0x0000,0x0000,
  0xffff,0xffff,0xffff,0x0007,
  0x0007,0xeee7,0x0007,0x0007,
  0xeee7,0x0007,0x0007,0xeee7,
  0x0007,0x0007,0xeee7,0xeee7,
  /*cursor4*/
  0x3fff,0x3fff,0xdfff,0xdaff,
  0xe5ff,0xfdff,0xf07f,0xeabf,
  0xe5ff,0xedbf,0xf231,0x1aa0,
  0xf064,0xc000,0xffe0,0xffe4,
  0xc000,0xc000,0x2000,0x2400,
  0x1a00,0x0200,0x0f80,0x1540,
  0x1dc0,0x1240,0x1dce,0x155f,
  0x0f9b,0x001f,0x001f,0x001b

  };

void changecursor(int *shape)
{ i.x.ax = 9;
  i.x.bx = 0;
  i.x.cx = 0;
  i.x.dx = (unsigned)shape;
  segread(&s);
  s.es = s.ds;
  int86x(0x33,&i,&i,&s);
  return;
  }

changecursor(cursor[i]);   // cursor[i]

/*returns scan code of the key that has been hit*/
//Up : 72 Down : 80 Left : 75 Right : 77

int getkey()
{ while(!kbhit()) delay(25);
  i.h.ah=0x00;
  int86(0x16,&i,&o);
  return(o.h.ah);
  // ah : scan code
  // al : ascii code
  }

// This will return the scan code without waiting
int xgetkey()
{ while(!kbhit()) delay(25);
  i.h.ah=0x00;
  int86(0x16,&i,&o);
  return(o.h.al);
  // ah : scan code
  // al : ascii code
  }

// Get special key status

unsigned char getShiftStatus() {
   i.h.ah=0x02;
   int86(0x16,&i,&o);
   return(o.h.al);
   // Bit No : Status
   // 0	     : Right shift depressed
   // 1      : Left shift depressed
   // 2      : Ctrl depressed
   // 3      : Alt depressed
   // 4      : Scroll lock on
   // 5      : Num lock on
   // 6      : Caps lock on
   // 7      : Insert on
   }