Download or view compound.frink in plain text format
// Test program to determine the mass of a chemical compound.
use elements.frink
// Returns the mass of a molecule of a chemical compound like "H2SO4" or "NaCl"
// To get the molar mass, multiply the results by "avogadro".
mass[compound] :=
{
mass = 0 amu
// The regular expression below breaks into pairs of element names
// and their count.
for [elem,count] = compound =~ %r/([A-Z][a-z]{0,2})(\d*)/g
{
if (! count)
count = 1
else
count = eval[count]
e = Element.getByName[elem]
if (e == undef)
return "Error: Unknown element $elem. Note that case is important!"
else
mass = mass + e.atomicMass * count
}
return mass
}
Download or view compound.frink in plain text format
This is a program written in the programming language Frink.
For more information, view the Frink
Documentation or see More Sample Frink Programs.
Alan Eliasen was born 19966 days, 15 hours, 44 minutes ago.