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return type "string"

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[quote][i]Originally posted by datrix[/i]
[br]Version: OriginPro 8.1G SR3 v8.1.34.90
Operating System: Windows XP SP3

Hello,

our institute uses the above mentioned Version of Origin and I have two little questions:

1. Problem with return type "string"

simple testcase:

[code]
string ReturnString(){
string a="abc";
out_str(a); // Output -> "abc" -> Works
return a;
}
[/code]

compiles fine but after execution of ReturnString();
on error message appears:
[code]
ung�ltige Argumentanzahl an Funktion �bergeben : 
#Command Error!
[/code]

analogous translation: "invalid number of arguments delivered to function"
The message is not very helpful because the function "ReturnString()" does not have any arguments [?]
What causes this error?

----------------------------

2. When a double click between two columns within a worksheet is performed (in the normal Origin GUI),
the column width exactly changes perfect to the width of the largest cell.
I would like to create the this effect with C++ code, but for example

[code]
...
wks.Columns(0).SetWidth();
...
[/code]

creates not the same effect. How can I solve this problem?

Thanks
datrix

[/quote]

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T O P I C R E V I E W
datrix	Posted - 08/24/2011 : 07:30:08 AM Version: OriginPro 8.1G SR3 v8.1.34.90 Operating System: Windows XP SP3 Hello, our institute uses the above mentioned Version of Origin and I have two little questions: 1. Problem with return type "string" simple testcase: string ReturnString(){ string a="abc"; out_str(a); // Output -> "abc" -> Works return a; } compiles fine but after execution of ReturnString(); on error message appears: ung�ltige Argumentanzahl an Funktion �bergeben : #Command Error! analogous translation: "invalid number of arguments delivered to function" The message is not very helpful because the function "ReturnString()" does not have any arguments What causes this error? ---------------------------- 2. When a double click between two columns within a worksheet is performed (in the normal Origin GUI), the column width exactly changes perfect to the width of the largest cell. I would like to create the this effect with C++ code, but for example ... wks.Columns(0).SetWidth(); ... creates not the same effect. How can I solve this problem? Thanks datrix
4 L A T E S T R E P L I E S (Newest First)
datrix	Posted - 08/26/2011 : 09:51:48 AM Thank you. I think it is supported. I can use all of those functions returning string and struct and all other types, when enclosing it into a void function. void vCall_openGUI(){ GUIVALUES gv; gv = openGUI(); if (gv.a == true/false){//do s.th.} if (gv.b == true/false){//do s.th.} if (gv.bGUICanceld == true/false){//do s.th.} } LT prompt: >> vCall_openGUI() //<--- Will not create some error messages and works quite good. I was just wondering why the error message is created when calling "openGUI()" directly. greets datrix
cpyang	Posted - 08/25/2011 : 9:59:34 PM 1. return struct is probably not supported in Origin C, and you can easily pass in the struct by pointer or reference, like bool openGUI(GUIVALUES & gv){ gv.a = tr.a.nVal; return true; } 2. bool is internally an int, so you can just use out_int for those. CP
datrix	Posted - 08/25/2011 : 07:05:24 AM Hello Penn, thank you for your answer. For the string return it works now, but what about returning structs? example: (Building small GUI with 2 checkboxes and return the struct that catches the values the user set) #include <Origin.h> #include <GetNbox.h> typedef struct tagGUIValues{ bool a; bool b; bool bGUICanceld; } GUIVALUES; GUIVALUES openGUI(){ GUIVALUES gv; // Build GUI GETN_TREE(tr) GETN_CHECK(a, "Checkbox 1", false) GETN_CHECK(b, "Checkbox 2", true) // initialize GUI and read values into struct if(GetNBox(tr, "label text", "some other text")){ gv.a = tr.a.nVal; gv.b = tr.b.nVal; gv.bGUICanceld = false; return gv; } else { gv.bGUICanceld = true; out_str("GUI canceld!"); return gv; } } This is definetly corect code and compiles fine, runs fine, but creates the same error message as with the "return string" example above. ------------------------------------------- Another question concernig basic I/O operations we have out_int("number is = ",12); //for int out_str("number is = 12"); // for strings out_double("number is = ",12.00); //for double out_tree ... // for trees what about something like "out_bool();" Does s.th. like this exists? greets datrix
Penn	Posted - 08/24/2011 : 11:41:10 PM Hi datrix, For problem 1: Maybe you have not called this Origin C function by using LabTalk statement correctly. I call this Origin C in LabTalk like: string str$ = ReturnString()$; str$ = ; And it works fine. Here, the returned value needs to be assigned to a LabTalk variable, and the $ symbol is needed. You can find the related contents from the help document (Origin C>Programming Guide>Introduction to Origin C>Calling Functions>Calling Origin C from LabTalk>Returning Variables to LabTalk>Returning String). For problem 2: It is a bug and we will try to fix it. Thanks for reporting this. Penn

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