The purpose of this program is to write a FORTRAN program which can be used to numerically solve the wave equation on a 2-Dimensional Cartesian grid with various boundaries and initial conditions.<br /><br />Well so far in the main program I have the code which requests the user to input the name of the file which they would like the initial values read from. If this file is not in the correct directory or doesn't exist it reads from a file with default values.<br /><br />The only part that I really need help on is the subroutine that does the mathematical calculations of the program. I don't fully understand the wave equation, and obviously this is giving me trouble in coding a FORTRAN program that calculates values for it.<br /><br />Below are the requirements for the wave equation. Any help or just a point in the right direction would be greatly appreciated <img src="http://static.dreamincode.net/forums/style_emoticons/default/smile.gif" style="vertical-align:middle" emoid="
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