Avoid trailing zeroes in printf()

Question

I keep stumbling on the format specifiers for the printf() family of functions. What I want is to be able to print a double (or float) with a maximum given number of digits

Answer 1

Slight variation on above:

1. Eliminates period for case (10000.0).
2. Breaks after first period is processed.

Code here:

void EliminateTrailingFloatZeros(char *iValue)
{
  char *p = 0;
  for(p=iValue; *p; ++p) {
    if('.' == *p) {
      while(*++p);
      while('0'==*--p) *p = '\0';
      if(*p == '.') *p = '\0';
      break;
    }
  }
}

It still has potential for overflow, so be careful ;P