[B.Hamada]

Hi all, I have written a UDF to a variable Cp, but when I interpreted it, an error appears on line 12:

line 12: exp: too many arguments supplied (argument 2)

My UDF:

#include "udf.h" 
DEFINE_SPECIFIC_HEAT(my_user_cp, T, Tref, h, yi) 
{ 
real cp; 
real delta=6; 
real Tmelt=299.5; 
real cps=1413; 
real cpl=1797.6; 
real lf=232; 

if (T <= Tmelt) 
{ 
cp = cps+lf*exp(-0,5*(T-Tmelt)*(T-Tmelt)); 
} 
else if (T > Tmelt)
{ 
cp = cpl+lf*exp(-0,5*(T-Tmelt)*(T-Tmelt)); 
} 
*h = cp*(T-Tref); 
return cp; 
}

So, please help me to rewrite it correctly!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:c onfused::c onfused:

[B.Hamada]

PLeaaaaaaaaaaaaaaaaaaaaaaaaaaaaaase help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

[upeksa]

#include "udf.h"
DEFINE_SPECIFIC_HEAT(my_user_cp, T, Tref, h, yi)
{
real cp;
real delta=6;
real Tmelt=299.5;
real cps=1413;
real cpl=1797.6;
real lf=232;

if (T <= Tmelt)
{
cp = cps+lf*exp(-0.5*(T-Tmelt)*(T-Tmelt));
}
else if (T > Tmelt)/*no need if statement, "else" is enough*/
{
cp = cpl+lf*exp(-0.5*(T-Tmelt)*(T-Tmelt));
}
*h = cp*(T-Tref);
return cp;
}

[pakk]

Upkesa gives the right answer, I can give some more explanation.

You used:

exp(-0,5*(T-Tmelt)*(T-Tmelt))

In the c programming language, the symbol used for decimal notation is the dot (.) and not the comma (,). The comma is used to separate inputs. So your code was read as if the function "exp" was called with two arguments, one equal to "-0", and one equal to "5*(T-Tmelt)*(T-Tmelt)". But the function "exp" should only have one argument, so that is why the compiler gave the error message "too many arguments supplied".

[B.Hamada]

Originally Posted by upeksa

#include "udf.h"
DEFINE_SPECIFIC_HEAT(my_user_cp, T, Tref, h, yi)
{
real cp;
real delta=6;
real Tmelt=299.5;
real cps=1413;
real cpl=1797.6;
real lf=232;

if (T <= Tmelt)
{
cp = cps+lf*exp(-0.5*(T-Tmelt)*(T-Tmelt));
}
else if (T > Tmelt)/*no need if statement, "else" is enough*/
{
cp = cpl+lf*exp(-0.5*(T-Tmelt)*(T-Tmelt));
}
*h = cp*(T-Tref);
return cp;
}

Originally Posted by pakk

Upkesa gives the right answer, I can give some more explanation.

You used:

exp(-0,5*(T-Tmelt)*(T-Tmelt))

In the c programming language, the symbol used for decimal notation is the dot (.) and not the comma (,). The comma is used to separate inputs. So your code was read as if the function "exp" was called with two arguments, one equal to "-0", and one equal to "5*(T-Tmelt)*(T-Tmelt)". But the function "exp" should only have one argument, so that is why the compiler gave the error message "too many arguments supplied".

Thank you very much for your help, it's really nice to give a hand to someone who needs a help. salam