Thread: Create a string in binary from a decimal number

Hi.

My first post here.

I am attempting to take a decimal number (0-255) and convert it to a binary string.

Something that looks like 0b01010101 for example.

Code:

//CONVERT DECIMAL TO BINARY FUNCTION
void tobinary(char str[11], int num)
{
    int i;
    bool bin;
    
    str[0] = '0';
    str[1] = 'b';
    
    for (i=2; i<10; i++)
    {
        bin = (num & 0x80);
        if (bin = 1)
        {
            str[i] = '1';
        }
        else 
        {
            str[i] = '0'; 
        }
        num <<= 1;   
    }
    str[i++] = '\0';
}

This is what i have written, but the string just comes out as 0b11111111, no matter what number i give it.

Not sure what i have done wrong. Is there anything obvious here to the more experienced eye?