Obviously you can't. Variables aren't constants.
int tf1 = 5; int tf2 = 30; int tf3 = 240; calcul( tf2 ); double cacul( int tf ){ if( tf == tf1) ... else if(tf == tf2) ... else if(tf == tf3) ... else /* default */ return(0); }
ffoorr:
I want to use differents Timframe into a swicht, but program ask for a constant
If tf1, tf2, tf3 don't change, you could do this:
#define tf1 5 #define tf2 30 #define tf3 240 double calcul( int tf ) { switch( tf ) { case tf1 : case tf2 : case tf3 : break; } return(0); } void OnStart() { calcul( tf2 ); }
There are reasons NOT to do this (see the third answer in stackoverflow post), but since "const int" doesn't work for MQL switch statements, I do admit sometimes doing this for switch() statements.
Why would someone use #define to define constants?
- stackoverflow.com
It's simple question but why would someone use #define to define constants?
whroeder1:
Obviously you can't. Variables aren't constants.
Thank this is what I have done
Obviously you can't. Variables aren't constants.
You are missing trading opportunities:
- Free trading apps
- Over 8,000 signals for copying
- Economic news for exploring financial markets
Registration
Log in
You agree to website policy and terms of use
If you do not have an account, please register
I want to use differents Timframe into a swicht, but program ask for a constant
This do not work : constant expression required