How FORTRAN Stores Two-Dimensional Arrays in Memory (27780)
The information in this article applies to:
- Microsoft FORTRAN Compiler for MS-DOS 4.0
- Microsoft FORTRAN Compiler for MS-DOS 4.01
- Microsoft FORTRAN Compiler for MS-DOS 4.1
- Microsoft FORTRAN Compiler for MS-DOS 5.1
- Microsoft FORTRAN compiler for OS/2 4.1
- Microsoft FORTRAN compiler for OS/2 5.1
- Microsoft FORTRAN PowerStation for MS-DOS 1.0
- Microsoft FORTRAN PowerStation for MS-DOS 1.0a
- Microsoft Fortran Powerstation 32 for Windows NT 1.0
- Microsoft Fortran Powerstation 32 for Windows NT 4.0
This article was previously published under Q27780 SUMMARY
FORTRAN is different from languages such as C and Pascal in the way that it
stores two-dimensional arrays in memory. Although array elements are
referenced in row major notation, i.e., (row, column), just as in C or
Pascal, FORTRAN stores two-dimensional arrays as one-dimensional column
arrays.
For example, in C, a two-dimensional array with three rows and four
columns will be stored in memory in the following sequence:
(1,1),(1,2),(1,3),(1,4),(2,1),(2,2),(2,3),(2,4),(3,1),(3,2),(3,3),(3,4)
However, FORTRAN will store the same array in the following
sequence:
(1,1),(2,1),(3,1),(1,2),(2,2),(3,2),(1,3),(2,3),(3,3),(1,4),(2,4),(3,4)
| Modification Type: | Major | Last Reviewed: | 12/1/2003 |
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| Keywords: | kbLangFortran KB27780 |
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