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

August 14, 2016

C Program to Convert Binary Code of a Number into its Equivalent Gray’s Code using Recursion.

```
#include <stdio.h>
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```
 
```
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int bintogray(int);
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```
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int main ()
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```
{
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    int bin, gray;
```
```
 
```
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    printf("Enter a binary number: ");
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    scanf("%d", &bin);
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    gray = bintogray(bin);
```

    printf("The gray code of %d is %d\n", bin, gray);

```
    return 0;
```
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}
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```
 
```
```
int bintogray(int bin)
```
```
{
```
```
    int a, b, result = 0, i = 0;
```
```
 
```
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    if (!bin)
```
```
    {
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        return 0;
```
```
    }
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```
    else
```
```
    {
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        a = bin % 10;
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```
        bin = bin / 10;
```
```
        b = bin % 10;
```
```
        if ((a && !b) || (!a && b))
```
```
        {
```

            return (1 + 10 * bintogray(bin));

```
        }
```
```
        else
```
```
        {
```

            return (10 * bintogray(bin));

```
        }
```
```
    }
```
```
}
```

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