Ubuntu
gcalctool package

Problems with order of operations

Bug #761829 reported by Michał Dulko
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
GCalctool
Confirmed
Undecided
Unassigned
gcalctool (Ubuntu)
Confirmed
Undecided
Unassigned

Bug Description

Binary package hint: gcalctool

48÷2(9+3) = 288 and this is the right answer, but gcalctool returns 2.

Revision history for this message
Andrew Simmonds (andrew-c-side) wrote :

Using the exact sequence shown I get the same incorrect result.

Inserting a multiply between the 2 and ( gives the correct result.

Changed in gcalctool (Ubuntu):
status: New → Confirmed
Revision history for this message
Michał Dulko (michal-dulko) wrote :

http://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=103110 - explains this behaviour a little. Is it intended?

Revision history for this message
Andrew Simmonds (andrew-c-side) wrote :

There's nothing in the help that describes this situation but a look at the equation parser in the source would seem to agree with the behaviour you have described.

So 48÷2(9+3) is equivalent to 48÷(2x(9+3)) i.e. the precedence of the multiplication is raised in this situation.

Andrew Simmonds (andrew-c-side)
Changed in gcalctool (Ubuntu):
status: Confirmed → New
Revision history for this message
Andrew Simmonds (andrew-c-side) wrote :

Since help currently makes no mention of this, I suggest adding it to the "Basic Equations" page.

Andrew Simmonds (andrew-c-side)
Changed in gcalctool (Ubuntu):
status: New → Confirmed
Changed in gcalctool:
status: New → Confirmed
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