How to count set bits in a floating point number in C?

#include

// A utility function to count set bits in a char.
unsigned int countSetBitsChar(char n)
{
unsigned int count = 0;
while (n)
{
n &= (n-1);
count++;
}
return count;
}

// Returns set bits in binary representation of x
unsigned int countSetBitsFloat(float x)
{
// Count number of chars (or bytes) in binary representation of float
unsigned int n = sizeof(float)/sizeof(char);

// typcast address of x to a char pointer
    unsigned char *ptr = (unsigned char *)&x; 

int count = 0; // To store the result
for (int i = 0; i < n; i++)
{
count += countSetBitsChar(*ptr);
ptr++;
}
return count;
}

// Driver program to test above function
int main()
{
float x = 0.15625;
printf ("Binary representation of %f has %u set bits ", x,
countSetBitsFloat(x));
return 0;
}