Write a function to determine the number of bits required to convert int A to B.

Solution #1: Basically, the question asks you to figure out which bits are different in A and B. Example: in case of 32 and 3, answer is 3 as they have 3 bits which are different. Taking a XOR and then counting the no. of 1s is the simplest approach. Here is the code,

void findBits(int a, int b)
{
    int c = a^b;

    int count=0;

    for(;c!=0; c=c>>1)
        count += c&1;

    printf("Number of bits required to convert int A to B is %d\n", count);
}