Numerical Recipes in Fortran 90: The Art of Parallel by William H. Press, Saul A. Teukolsky, William T. Vetterling,

By William H. Press, Saul A. Teukolsky, William T. Vetterling, Brian P. Flannery

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Two related functions return the location of particular elements in an array. The returned value is a one-dimensional integer array containing the respective subscript of the element along each dimension. Note that when the argument object is a one-dimensional array, the returned object is an integer array of length 1, not simply an integer. ) 950 Chapter 21. Introduction to Fortran 90 Language Features Array Manipulation Functions These include many powerful features that a good Fortran 90 programmer should master.

1]. For example, pointers are always “born” in an undefined status, where the associated function returns unpredictable values. For completeness, here is a list of Fortran 90’s intrinsic procedures not already mentioned: Other Numerical Representation Functions: digits, exponent, fraction, rrspacing, scale, set exponent, spacing, maxexponent, minexponent, precision, radix, range, selected int kind, selected real kind. Lexical comparison: lge, lgt, lle, llt. Character functions: ichar, char, achar, iachar, index, adjustl, adjustr, len trim, repeat, scan, trim, verify.

False. nullify(x) else if (associated(x)) deallocate(x) end if ... nx=... allocate(x(nx)) x(1:nx)=... 5 Advanced Fortran 90 Topics 957 SUBROUTINE recipe(arg) REAL(SP) :: arg REAL(SP) :: global_var call recipe_private CONTAINS Sample page from NUMERICAL RECIPES IN FORTRAN 90: The Art of PARALLEL Scientific Computing (ISBN 0-521-57439-0) Copyright (C) 1986-1996 by Cambridge University Press. Programs Copyright (C) 1986-1996 by Numerical Recipes Software. Permission is granted for internet users to make one paper copy for their own personal use.

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