C/math.h/fmax

    
//Declaration: float fmaxf(float a, float b); 
               double fmax(double a, double b); 
               long double fmaxl(long double a, long double b);  
 
    
  
  #include <math.h>
  #include <stdio.h>
  int main(void)
  {
     printf("%l", fmaxl (10,12));
 
  }