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Subroutine: ARITH

Purpose: Do an arithmetic operation on two real arrays and store
the result in a third one. This routine checks for BLANK
values.

Category: ARRAY

File: arith.c

Author: K.G. Begeman

Use: CALL ARITH( ARRAY1, input real array
OP, input character
ARRAY2, input real array
ARRAY3, output real array
NUMBER ) input integer

ARRAY1 input array.
OP character operand ('+','-','*','/').
ARRAY2 input array.
ARRAY3 output array.
NUMBER number of operations.

Description: For every element of the arrays 1, 2 and 3 the
following operation is performed:
ARRAY3 = ARRAY1 'OP' ARRAY2
The arrays need not be different. OP can be '+', '-', '*'
or '/'. When it is not one of these four, ARRAY3 is
filled with BLANKs. Other errors (e.g. zero divide) also
result in a BLANK value.

Example: Add 100 elements of array A to array B and store the
result in B.
CALL ARITH(A,'+',B,B,100)

Updates: Jul 21, 1989: KGB, original document.