Basic code. Help can you make this string array code work.
<CODE REMOVED>
Simple eh! except that both elements print null!!!! should be EURUSD and EURJPY
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Simple eh! except that both elements print null!!!! should be EURUSD and EURJPY
Do this . . .
string look1, look2, symarray[] = {"EURUSD","EURJPY","GBPUSD","USDCHF","JPYGBP"};
string look1, look2, symarray[5]; symarray[5] = {"EURUSD","EURJPY","GBPUSD","USDCHF","JPYGBP"}; // Does this compile? ArraySetAsSeries(symarray,false); // index starting 0 at left // What type does ASAS support?
ArraySetAsSeries - MQL4 Documentation
| array[] | - | The numeric array to set. |
string look1, look2, symarray[5];
symarray[5] = {"EURUSD","EURJPY","GBPUSD","USDCHF","JPYGBP"};
Print("symarray 2 elements 0 = "+look1+" and 1= "+look2);
Simple eh! except that both elements print null!!!! should be EURUSD and EURJPY
I am so glad that I am not the only one that has problems with this.
From what I have read in the 'Book" your code should work but in similar situations as yours, it doesn't and you have to enter seperate lines of code for each part of the array
Change the code to
string look1, look2, symarray[5]; symarray[0] = "EURUSD"; //"EURJPY","GBPUSD","USDCHF","JPYGBP"}; symarray[1] = "EURJPY"; //symarray[2]= //etc //etc //etc //etc //etc //etc //etc ArraySetAsSeries(symarray,false); // index starting 0 at left look1=symarray[0]; look2=symarray[1]; Print("symarray 2 elements 0 = "+look1+" and 1= "+look2);
and it works, but this is a long-winded way of getting there.
Hopefully somebody knows a better way
string look1, look2, symarray[5]; symarray[5] = {"EURUSD","EURJPY","GBPUSD","USDCHF","JPYGBP"}; ArraySetAsSeries(symarray,false); // index starting 0 at left look1=symarray[0]; look2=symarray[1]; Print("symarray 2 elements 0 = "+look1+" and 1= "+look2);
Simple eh! except that both elements print null!!!! should be EURUSD and EURJPY
The problem is that you defined symarray as a string array with five elements but tried to access the an undefined 6th element of the array. Remember: arrays are zero-based, which means the first element's index is zero. So, in your code the element indexes for symarray are 0, 1, 2, 3, and 4. Here is a slight modification to your code which works:
string look1, look2, symarray[5] = {"EURUSD","EURJPY","GBPUSD","USDCHF","JPYGBP"}; ArraySetAsSeries(symarray,false); // index starting 0 at left look1=symarray[0]; look2=symarray[1]; Print("symarray 2 elements 0 = "+look1+" and 1= "+look2);
It is true that the Documentation says "numeric" but it appears ArraySetAsSeries() works in this situation. For example, compare the above code and log to:
string look1, look2, symarray[5] = {"EURUSD","EURJPY","GBPUSD","USDCHF","JPYGBP"}; ArraySetAsSeries(symarray,true); // index starting 0 at left (Changed second arg from "false" to "true") look1=symarray[0]; look2=symarray[1]; Print("symarray 2 elements 0 = "+look1+" and 1= "+look2);
Hopefully somebody knows a better way
Look up to my earlier post . . .
Thanks Raptor.
I had the page open a while before I replied, so missed yours.
Just to be clear.
If I want to assign values to a string array by using {"?","?","?","?"}
I have to do it at the same time as declaring the array?
Thanks Raptor.
I had the page open a while before I replied, so missed yours.
Just to be clear.
If I want to assign values to a string array by using {"?","?","?","?"}
I have to do it at the same time as declaring the array?
On a related note, I will be grateful if you can tell me what I am missing here.
This will not compile and I get the error '}' - comma or semicolon expected
//--- input parameters extern double LotSizePT1=0.1; extern double LotSizePT2=0.2; extern double LotSizePT3=0.3; extern double LotSizePT4=0.4; extern double LotSizePT5=0.5; // int init() { return(0); } //+------------------------------------------------------------------+ int deinit() { return(0); } //+------------------------------------------------------------------+ //| expert start function | //+------------------------------------------------------------------+ int start() { //---- double LotSizearray[6]={0,LotSizePT1,LotSizePT2,LotSizePT3,LotSizePT4,LotSizePT5}; /* double LotSizearray[6]; LotSizearray[1]= LotSizePT1; LotSizearray[2]= LotSizePT2; LotSizearray[3]= LotSizePT3; LotSizearray[4]= LotSizePT4; LotSizearray[5]= LotSizePT5; */ //---- return(0); } //+------------------------------------------------------------------+
This works fine though
//--- input parameters extern double LotSizePT1=0.1; extern double LotSizePT2=0.2; extern double LotSizePT3=0.3; extern double LotSizePT4=0.4; extern double LotSizePT5=0.5; // int init() { return(0); } //+------------------------------------------------------------------+ int deinit() { return(0); } //+------------------------------------------------------------------+ //| expert start function | //+------------------------------------------------------------------+ int start() { //---- //double LotSizearray[6]={0,LotSizePT1,LotSizePT2,LotSizePT3,LotSizePT4,LotSizePT5}; double LotSizearray[6]; LotSizearray[1]= LotSizePT1; LotSizearray[2]= LotSizePT2; LotSizearray[3]= LotSizePT3; LotSizearray[4]= LotSizePT4; LotSizearray[5]= LotSizePT5; //---- return(0); } //+------------------------------------------------------------------+
I'm sure that I will be kicking myself when it is explained :(
Thanks.
type name[] = { CONSTANT1, CONSTANT2 ...};
you're not using constants but variables.
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Simple eh! except that both elements print null!!!! should be EURUSD and EURJPY