C program to convert octal number to binary number.

source code

#include<stdio.h>

#define MAX 1000

int main()

{

   char octalNumber[MAX];

   long int i=0;

   printf("Enter any octal number: ");

   scanf("%s",octalNumber);

   printf("Equivalent binary value: ");

   while(octalNumber[i])

{

   switch(octalNumber[i])

{

      case '0':  printf("000"); break;

                case '1': printf("001"); break;

                case '2': printf("010"); break;

                case '3': printf("011"); break;

      case '4': printf("100"); break;

     case '5': printf("101"); break;

     case '6': printf("110"); break;

      case '7': printf("111"); break;

   default:  printf("\nInvalid octaldigit %c ",octalNumber[i]); 

    return 0;

    }

    i++;

 }

   getch();

   return 0;

}