How to pass array to a function
hi, I had working mql4 expert, and after a new build it stopped to work as expected. Current build is 765
Namely, array passed to a function has no values.
Please see attached full code and of its execution output:
{
ArrayResize(listOfLiveMNumbers,10,4);
ArrayResize(listOfStopMNumbers,10,4);
int resNums[][2];
ArrayResize(resNums,0);
Print("listOfLiveMNumbers");
ArrayPrintInt(listOfLiveMNumbers);
Print("listOfStopMNumbers");
ArrayPrintInt(listOfStopMNumbers);
ArrayMerge(listOfStopMNumbers, listOfLiveMNumbers, resNums);
}
//+------------------------------------------------------------------+
int ArrayMerge(int &stopArray[][], int &liveArray[][], int &resultArray[][])
{
bool isfound=false;
int i=0,j=0,as=0;
if(ArraySize(liveArray)==0 || ArraySize(stopArray)==0)
{
Print("ArrayMerge: both arrays must have values");
Print("liveArray");
ArrayPrintInt(liveArray);
Print("stopArray");
ArrayPrintInt(stopArray);
return(-1);
}
..............[/CODE]
[CODE]
test EURCHF,M30: listOfLiveMNumbers
test EURCHF,M30: Array Size (ArrayPrintInt):20
test EURCHF,M30: Array ([0][0]=0,[0][1]=0 ; [1][0]=0,[1][1]=0 ; [2][0]=0,[2][1]=0 ; [3][0]=0,[3][1]=0 ; [4][0]=0,[4][1]=0 ; [5][0]=0,[5][1]=0 ; [6][0]=0,[6][1]=0 ; [7][0]=0,[7][1]=0 ; [8][0]=0,[8][1]=0 ; [9][0]=0,[9][1]=0 ; )
test EURCHF,M30: listOfStopMNumbers
test EURCHF,M30: Array Size (ArrayPrintInt):20
test EURCHF,M30: Array ([0][0]=0,[0][1]=0 ; [1][0]=0,[1][1]=0 ; [2][0]=0,[2][1]=0 ; [3][0]=0,[3][1]=0 ; [4][0]=0,[4][1]=0 ; [5][0]=0,[5][1]=0 ; [6][0]=0,[6][1]=0 ; [7][0]=0,[7][1]=0 ; [8][0]=0,[8][1]=0 ; [9][0]=0,[9][1]=0 ; )
test EURCHF,M30: ArrayMerge: both arrays must have values
test EURCHF,M30: liveArray
test EURCHF,M30: Array Size (ArrayPrintInt):0
test EURCHF,M30: Array ()
test EURCHF,M30: stopArray
test EURCHF,M30: Array Size (ArrayPrintInt):0
test EURCHF,M30: Array ()
Your arrays are resized but not initialized with some values. You have to fill toyr arrays with some values
Your arrays are resized but not initialized with some values. You have to fill toyr arrays with some values
Arrays are initialized with 0's this is what you can see in the output of the function ArrayPrintInt(listOfLiveMNumbers):
In the expert of course there are proper values, however behavior is the same ...
The same function prints "the same" array passed to the function and as a result - it does not have any elements.
test EURCHF,M30: Array Size (ArrayPrintInt):0
test EURCHF,M30: Array ()Arrays are initialized with 0's this is what you can see in the output of the function ArrayPrintInt(listOfLiveMNumbers).
In the expert of course there are proper values, however behavior is the same ...
The same function prints "the same" array passed to the function and as a result - it does not have any elements.All is OK with the code you posted
Checked the attached : _test_array.mq4
Made some changes to initialize the array elements - so the error is not in the code of the "test.mq4"
All is OK with the code you posted
Checked the attached : _test_array.mq4
Made some changes to initialize the array elements - so the error is not in the code of the "test.mq4"Unbelievable .... ArraySize function does not return correct result !!! Thank you very much for your help !!!
Unbelievable .... ArraySize function does not return correct result !!! Thank you very much for your help !!!
Happy coding 
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hi, I had working mql4 expert, and after a new build it stopped to work as expected. Current build is 765
Namely, array passed to a function has no values.
Please see attached full code and of its execution output:
test.mq4
{
ArrayResize(listOfLiveMNumbers,10,4);
ArrayResize(listOfStopMNumbers,10,4);
int resNums[][2];
ArrayResize(resNums,0);
Print("listOfLiveMNumbers");
ArrayPrintInt(listOfLiveMNumbers);
Print("listOfStopMNumbers");
ArrayPrintInt(listOfStopMNumbers);
ArrayMerge(listOfStopMNumbers, listOfLiveMNumbers, resNums);
}
//+------------------------------------------------------------------+
int ArrayMerge(int &stopArray[][], int &liveArray[][], int &resultArray[][])
{
bool isfound=false;
int i=0,j=0,as=0;
if(ArraySize(liveArray)==0 || ArraySize(stopArray)==0)
{
Print("ArrayMerge: both arrays must have values");
Print("liveArray");
ArrayPrintInt(liveArray);
Print("stopArray");
ArrayPrintInt(stopArray);
return(-1);
}
..............[/CODE]
[CODE]
test EURCHF,M30: listOfLiveMNumbers
test EURCHF,M30: Array Size (ArrayPrintInt):20
test EURCHF,M30: Array ([0][0]=0,[0][1]=0 ; [1][0]=0,[1][1]=0 ; [2][0]=0,[2][1]=0 ; [3][0]=0,[3][1]=0 ; [4][0]=0,[4][1]=0 ; [5][0]=0,[5][1]=0 ; [6][0]=0,[6][1]=0 ; [7][0]=0,[7][1]=0 ; [8][0]=0,[8][1]=0 ; [9][0]=0,[9][1]=0 ; )
test EURCHF,M30: listOfStopMNumbers
test EURCHF,M30: Array Size (ArrayPrintInt):20
test EURCHF,M30: Array ([0][0]=0,[0][1]=0 ; [1][0]=0,[1][1]=0 ; [2][0]=0,[2][1]=0 ; [3][0]=0,[3][1]=0 ; [4][0]=0,[4][1]=0 ; [5][0]=0,[5][1]=0 ; [6][0]=0,[6][1]=0 ; [7][0]=0,[7][1]=0 ; [8][0]=0,[8][1]=0 ; [9][0]=0,[9][1]=0 ; )
test EURCHF,M30: ArrayMerge: both arrays must have values
test EURCHF,M30: liveArray
test EURCHF,M30: Array Size (ArrayPrintInt):0
test EURCHF,M30: Array ()
test EURCHF,M30: stopArray
test EURCHF,M30: Array Size (ArrayPrintInt):0
test EURCHF,M30: Array ()