Why am I getting this error?

I dont understand why I am getting the same error again, 'undefined function molaritet_NH4Cl ' I have given value to molaritet_NH4Cl

best_salt_1 and best_salt_2 are my inputs where they can have values: KCl, NH4Cl or ZnBr2.

maks_vektprosent are numbers lik 30 , 40 and 50

[Image Analyst]

You aren't just clicking the green run triangle without ever assigning any of the inputs are you?

Please show the function where you called this function and assigned best_salt_1,best_salt_2,maks_vektprosent_lost_KCl ,maks_vektprosent_lost_NH4Cl ,maks_vektprosent_lost_zinkbromid

[Muazma Ali]

I ran this function as both calling it from another function and as from the command line where I just assigned best_salt_1 ="ZnBr2" and best_salt_2="NH4Cl" and with different values for maks_vektprosent but I got the same error..

Answer 1

[Walter Roberson]

Your code assigns to molaritet_NH4Cl if best_salt_1 or best_salt_2 are exactly 'NH4Cl ' with a trailing space

   if strcmpi(best_salt_1,' KCl')|strcmpi(best_salt_2,'KCl')
       
       if strcmpi(best_salt_1,' NH4Cl')|strcmpi(best_salt_2,'NH4Cl')
           
           samlet_ionic_strength=0.5*(molaritet_NH4Cl*1^(2) + molaritet_NH4Cl*(-1)^2 + molaritet_KCl*1^(2) + molaritet_KCl*(-1)^2);

That code uses the value of molaritet_NH4Cl if best_salt_1 is (case insensitive) ' NH4Cl' with a leading space or if best_salt_2 is (case insensitive) 'NH4Cl' with no spaces

The strcmpi() tests you coded will not match if best_salt_1 or best_salt_2 are 'NH4Cl ' with a trailing space as coded in your switch(), and the switch() statements will not match if best_salt_1 or best_salt_2 are ' NH4Cl' with a leading space or 'NH4Cl' with no space or are (for example) 'NH4CL ' (trailing space but not a case-sensitive match for 'NH4Cl ' that you have coded in your switch()

Spaces and case sensitivity matter.

[Muazma Ali]

Thanks a lot ! :)