Two ways to convert decimal numbers to binary strings

I'll show you two ways to convert decimal to binary.

First, the most basic way is apply the following pseudo-code:

int x
char[80] arr
do{
   reminder = x%2;
   arr[i] = reminder
}while (x/2 > 0);
reverse arr;

And the other is more advanced (and more simple), it use bitwise operations instead:

int x
while (x > 0){
        arr[i] = ((x & 1) ? '1' : '0');
        x >>=1;
}
reverse arr

and here's a C code for the last one:

 
//I am not the author of this function, I copied from the link below
void dec2binary(long i){
    
    char* str = malloc(sizeof(long)*8*sizeof(char));
    
    char* p = str;
    while (i > 0){
        *p++ = ((i & 1) ? '1' : '0');
        i >>=1;
    }

    while( p-- != str ) /* print out the result backwards */
        printf("%c",*p);

    free(str);
}

please see:
http://www.daniweb.com/code/snippet216349.html