FORTRAN 90: Functions, Modules, and Subroutines (pdf format)

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Practice • Take a *working* version of your CAPE/CIN program and put your function into a module. • Compile and run your program to see that it • Compile and run your program to see that it works as advertised.
External Subprograms • Attached after the END PROGRAM statement of program unit. – Example: Temperature conversion revisited. • Note #1: Function name is declared in the main program and subprogram. • Note #2: Compiler may not be able to check references to subprogram. – Argument type, number of arguments, type of return value, etc.
Page 1 and 2: FORTRAN 90: Functions, Modules, and
Page 3 and 4: Functions • Intrinsic, or library
Page 5 and 6: Specification/Execution Sections
Page 7 and 8: Main program syntax • This subpro
Page 9 and 10: Method of Execution • Main progra
Page 11 and 12: Scope • May be several points whe
Page 13 and 14: Rule #2 • A global entity is acce
Page 15 and 16: Modules • Often similar calculati
Page 17 and 18: Translation to source program • T
Page 19: What are all these file types? •
Page 23 and 24: • subroutine heading specificatio
Page 25 and 26: yet different • Functions are des
Page 27 and 28: Subroutine syntax • Subroutine he
Page 29: Argument association • Coordinate

FORTRAN 90: Functions, Modules, and Subroutines (pdf format)

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