FORTRAN-77 Computer Program Structure and Internal Documentation Standards for Scientific Applications.

An improved approach to programming has been developed in the last decade which produces reliable, efficient computer programs using fewer labor hours and far fewer maintenance hours than other coding approaches. This approach uses a disciplined style and is usually referred to as structured programming. This standard applies the concepts of structured programming to FORTRAN-77 and contains procedures which result in better, more reliable computer programs. It is based on many actual experiences, careful research, and documented studies. This standard classifies coding practices into five categories mandatory, recommended, permitted, discouraged, and forbidden. The objectives of this standard in directing the use of disciplined programming practices are 1 To apply an architectural and syntactical method to the FORTRAN-77 language that greatly reduces the probability of errors 2 To produce code that is modified easily, rapidly, and reliably by applying the principles of modular, structured, and machine interchangeable FORTRAN-77. 3 To improve code clarity, simplicity, robustness, and reliability 4 To prohibit convoluted logic and 5 to produce well-documented code.