C Program to Convert Octal to Binary

Learn about C Program to Convert Octal to Binary in the below code example. Also refer the comments in the code snippet to get a detailed view about what’s actually happening.

C Program to Convert Octal to Binary

We must compute power to convert from Octal to Binary. As a result, we will employ the pow() function, which is defined in the standard library function math.h. First, Octal will be transformed to Decimal, followed by a conversion from Decimal to Binary.

Source code:

 #include<stdio.h>
 #include<math.h>
 int main()
 {
     int oct, dec=0, bin=0, i=0;

     printf("Enter Octal Number: ");
     scanf("%d",&oct);
     while(oct != 0)
     {
         dec += (oct%10) * (pow(8,i));
         oct /= 10;
         i++;
     }
     i=1;
     while(dec != 0)
     {
         bin += (dec%2) * i;
         dec /= 2;
         i *= 10; 
     }

     printf("Binary Value=%d",bin);

     return 0;
 }

Output:

Enter Octal Number:20
Binary Value=10000

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