Another Example 

  Write a program which can say which key you have pressed from the key board? [Suppose you can press any digit, character or functional key on the key board. After scanning that information the program has to say the category of key.]

wb‡Pi Program wU F₇  w`‡q execute Kiv‡bv hvB‡e bv Ctrl+F₉  execute Ki‡Z n‡e| Explain.

DËit F₇ wb‡RB GKwU functional key hvi ASKEY value-Gi cª_g Ask 0. GB program wU F₇ w`‡q  execute Kiv‡bvi mgq Qó jvB‡b getch() Gi gva¨‡g ASKEY value-Gi cª_g Ask 0 co‡j Dnv num variable-Gi wfZi Rgv ev store nq hvnv mßg jvB‡bi while condition-‡K K‡i ‡`q| d‡j, compiler while loop - Gi body - ‡Z XzK‡Z cv‡i b| GKvi‡b Program wU F₇  w`‡q execute Kiv‡bv hvB‡e bv

      #include<stdio.h>

      #include<conio.h>

      void main(){

       int num,m;

       printf("\nEnter an inter vlaue =");

       num = getch();

       while(num != 0){

         printf("\nAskey = %d",num);

         num = getch();

       }

        

   }