C language, nested if statements of some experience ...

double f(double x)
{
double result;
if(x<0)
result=-x+sin(x);
else if(x==0)
result=0;
     else if(10>x>0)
          result=log2(x);
          else if(x>=10)
          result=pow(x,2);
return result;
}

 

 

 

double f(double x)
{
double result;
if(x<0)
result=-x+sin(x);
else if(0<x<10)
result=log2(x);
else if(x==0)
result=0;
else if(x>=10)
result=pow(x,2);
return result;
}

For the above two way, the first is correct, because the order of magnitude of those logically number (stage understanding)