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Program to read a character from KeyBoard using Interrupt 21h

Posted By: Easy Tutor     Category: C Programming     Views: 6143

Write a program to read a character from KeyBoard using Interrupt 21h. [ Equivalent to getch( ) ]

Code for Program to read a character from KeyBoard using Interrupt 21h in C Programming

 # include <stdio.h>
 # include <conio.h>
 # include   <dos.h>


 constchar Getch( );


 int main( )
 {
    int key=0;

    clrscr( );

    printf(" Press ANY key : ");

    key=Getch( );

    printf("\n\n ASCII Code for Input Key = %d",key);

    getch( );
    return 0;
 }

 /*************************************************************************///--------------------------------  Getch( )  ---------------------------///*************************************************************************/constchar Getch( )
 {
    union REGS InReg;
    union REGS OutReg;

    InReg.h.ah=0x8;

    int86(0x21,&InReg,&OutReg);

    return OutReg.h.al;
 }
  
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Easy Tutor
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