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 20145 days, 7 hours, 40 minutes ago.