conio.h

textbackground function is used to change of current background color in text mode. See available colors.

Declaration : void textbackground(int color);

textcolor function is used to change the color of drawing text in c programs.

Declaration :- void textcolor(int color);
where color is an integer variable. For example 0 means BLACK color, 1 means BLUE, 2 means GREEN and soon. You can also use write appropriate color instead of integer. For example you can write textcolor(YELLOW); to change text color to YELLOW. But use colors in capital letters only.

C programming code to change text color

#include<stdio.h>

wherey function return current vertical cursor position.

Declaration :- int wherey();

wherex function return current horizontal cursor position.

Declaration :- int wherex();

gotoxy in c: gotoxy function places cursor at a desired location on screen i.e. we can change cursor position using gotoxy function.

Declaration : void gotoxy( int x, int y);
where (x, y) is the position where we want to place the cursor.

C programming code for gotoxy

#include<stdio.h>
#include<conio.h>
 
main()
{
   int x, y;
 
   x = 10;
   y = 10;
 
   gotoxy(x, y);
 
   printf("C program to change cursor position.");
 
   getch();
   return 0;
}

Output:

kbhit in c: kbhit function is used to determine if a key has been pressed or not. To use kbhit function in your program you should include the header file "conio.h". If a key has been pressed then it returns a non zero value otherwise returns zero.

Declaration : int kbhit();

C programming code for kbhit

#include <stdio.h>
#include <conio.h>
 
main()
{
   while (!kbhit())
      printf("You haven't pressed a key.\n");
 
   return 0;
}

getche function prompts the user to press a character and that character is printed on screen.

getch in c language: getch function prompts the user to press a character and that character is not printed on screen, getch header file is conio.h.

C programming code for getch

/* getch in c example */
#include<stdio.h>
#include<conio.h>
 
main()
{
   printf("Waiting for a character to be pressed from the keyboard to exit.\n");
 
   getch();
   return 0;
}

delline function deletes the line containing the cursor and move all lines below it one line up.

clrscr function clears the screen amd move the cursor to upper left hand corner of screen.

C programming code for clrscr

#include<stdio.h>
#include<conio.h>
 
main()
{
   printf("Press any key to clear the screen.\n");
 
   getch();
 
   clrscr();
 
   printf("This appears after clearing the screen.\n");
   printf("Press any key to exit...\n");
 
   getch();
   return 0;
}