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Custom Programming Details
The process for having a custom program written is relatively simple. The first step is to send specific information for the problem you would like to solve and the data you would like to input and output. We may already have a program that will do what you need. If not, we might be able to revise an existing program to give you the input and output configuration you would like. As you know, there are many choices as to the input and output of a program. The next step is to let us know exactly how you would like to input data, how you would like to see the output and exactly what you would like done in the program. Include as many formulas as you can for solving the problem. This will make our job easier because we write programs in a step by step manner so that you can step through the program one line at a time to see equation execution in the order it is being performed.Step by step programming allows you to see not only the solution but also proof of how you obtained the solution. The sequence of execution can be written down as the program executes each line of code showing the equations and the answers. This gives us the proof we need as engineers for the solutions we provide. All software that is to be used by engineers should be tested with known data. No solution should ever be provided without proof. Being able to step through program execution one line at a time allows you to prove the answers the program provides. This is why we try to write all programs in a simple straight forward way that is similar to solving the problem “by hand”.Programs that were written in languages such as fortran or C can often be converted to run on the HP calculator. We can take almost any program that was written on a spreadsheet and convert it to run on the HP calculator. If there are any programs that you would like to have written or if there are any programs that you already own and would like to have customized, please contact us.
Custom Programming Benefits
Example Program
This is a simple program for designing a rectangular concrete beam with steel reinforcement. The input program is called "INPUT.BEAM", the main program is called "BEAM" and the output is simply tagged "ŲMn" in kips per foot. The program "BEAM" also uses another program called "BAR.AREA" that has not been shown here.
INPUT.BEAM « "ENTER COMPRESSIVE STRENGTH OF CONCRETE fc (ksi)" "" INPUT OBJ¨ "ENTER YIELD STRENGTH OF STEEL fy (ksi)" "" INPUT OBJ¨ "ENTER NO. OF BARS NB" "" INPUT OBJ¨ "ENTER BAR SIZE BS" "" INPUT OBJ¨ "ENTER WEB WIDTH bw (in)" "" INPUT OBJ¨ "ENTER EFFECTIVE DEPTH d (in)" "" INPUT OBJ¨ » BEAM « INPUT.BEAM .9 ¨ fc fy NB BS b d Ų « BS BAR.AREA NB * "As" ¨TAG HALT ¨ As « 'As*fy/( .85*fc*b)' EVAL ¨ a « 'As*fy* (d-a/2)' EVAL ¨ Mn « fc ß1. ¨ ß1 « 'a/ ß1' EVAL ¨ c « '.003*((d-c)/c)' EVAL ¨ “s « “s "“s" ¨TAG ' fy/29000' EVAL ¨ “y « IF '“s>“y' THEN "“s>“y ¨¨ fs=fy STEEL YIELDS UNDER-REINF. ACI CODE OK" MSGBOX ELSE "“s‰“y fs‹fy STEEL DOES NOT YIELD REDUCE As or INCREASE fc" MSGBOX END '.85*ß1* fc/fy*87/(87+fy)' EVAL ¨ —b « 'As/(b*d)' EVAL ¨ — « — "—" ¨TAG IF '—‰.75 *—b' THEN ELSE "—>—b & fs<fy COMPRESSION FAILURE" MSGBOX END 'Ų*Mn /12' EVAL '1_ft*kip ' ¨UNIT "ŲMn" ¨TAG
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HP48 & HP49 HEWLETT PACKARD CALCULATOR PROGRAMS
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