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Strange behavior of function READ in a loop. [message #81542]

Tue, 25 September 2012 10:10

Gerry Yu
Messages: 1
Registered: September 2012

Junior Member

Hello everyone:
I got a strange output with the function READ in a loop.
A simplified example is as below:
_______________________
pro test
print, "This is the first line.", format="(A30/)"
for i=1,3 do begin
read, a ,PROMPT="input:"
print, i,": input is ",a
endfor
end
______________________________
The expected output should be something like:
______________________________
This is the first line.
input:1
1: input is 1.0000
input:2
2: input is 2.0000
input:3
3: input is 3.0000
____________________________
But what I get is (with IDL 7.1.1 on Win 7):
____________________________
input:1
This is the first line.
input:2

1: input is 1.00000
input:3
2: input is 2.00000
3: input is 3.00000
_________________________________
I am really confused by such a result.
Do someone know what happens here?

Thanks in advance~

yu

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Strange behavior of function READ in a loop.

By: Gerry Yu on Tue, 25 September 2012 10:10

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