C Program to Convert Binary Code of a Number into its Equivalent Code using Recursion

#include < stdio.h>
 
int bintogray(int);
 
int main ()
{
    int bin, gray;
 
    printf("Enter a binary number: ");
    scanf("%d", &bin);
    gray = bintogray(bin);
    printf("The gray code of %d is %d\n", bin, gray);
    return 0;
}
 
int bintogray(int bin)
{
    int a, b, result = 0, i = 0;
 
    if (!bin)
    {
        return 0;
    }
    else
    {
        a = bin % 10;
        bin = bin / 10;
        b = bin % 10;
        if ((a && !b) || (!a && b))
        {
            return (1 + 10 * bintogray(bin));
        }
        else
        {
            return (10 * bintogray(bin));
        }
    }
}

Output

 Enter a binary number:   1011101 
The gray code of  1011101  is  1110011 

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