Sun Studio 12 Update 1: Debugging a Program With dbx

### Array Slicing Syntax for Fortran

For each dimension of an array, the full syntax of the print command to slice the array is:

 `print array-expression [first-expression : last-expression : stride-expression]`

where:

array-expression

Expression that should evaluate to an array type.

first-expression

First element in a range, also first element to be printed. Defaults to lower bound.

last-expression

Last element in a range, but might not be the last element to be printed if stride is not equal to 1. Defaults to upper bound.

stride-expression

Length of the stride. Defaults to 1.

The first expression, last expression, and stride expression are optional expressions that should evaluate to integers. For an n-dimensional slice, separate the definition of each slice with a comma.

For example:

 ```(dbx) print arr(2:6) arr(2:6) = (2) 2 (3) 3 (4) 4 (5) 5 (6) 6 (dbx) print arr(2:6:2) arr(2:6:2) = (2) 2 (4) 4 (6) 6```

To specify rows and columns, type:

 ```demo% f95 -g -silent ShoSli.f demo% dbx a.out Reading symbolic information for a.out (dbx) list 1,12 1 INTEGER*4 a(3,4), col, row 2 DO row = 1,3 3 DO col = 1,4 4 a(row,col) = (row*10) + col 5 END DO 6 END DO 7 DO row = 1, 3 8 WRITE(*,’(4I3)’) (a(row,col),col=1,4) 9 END DO 10 END (dbx) stop at 7 (1) stop at "ShoSli.f":7 (dbx) run Running: a.out stopped in MAIN at line 7 in file "ShoSli.f" 7 DO row = 1, 3```

To print row 3, type:

 ```(dbx) print a(3:3,1:4) ’ShoSli’MAIN’a(3:3, 1:4) = (3,1) 31 (3,2) 32 (3,3) 33 (3,4) 34 (dbx)```

To print column 4, type:

 ```(dbx) print a(1:3,4:4) ’ShoSli’MAIN’a(1:3, 1:4) = (1,4) 14 (2,4) 24 (3,4) 34 (dbx)```