How to check if a function is called?

Have the function return a bool, or have the function change a bool.

ex 1 : changing a bool

 bool didFunction = false ;
 
 void SampleFunk()
 {
   //do stuff
   didFunction = true ;
 }

 void Whatever()
 {
    if(didFunction)
    {
       //do stuff
    }
 }

ex 2 : return bool

 void Whatever()
 {
    if(SampleFunk())
    {
       //do stuff
    }
 }
 
 bool SampleFunk()
 {
    bool didSomeStuff = false ;
    //do stuff
    if(certain things got done right etc)
       didSomeStuff = true ;
 
    return didSomeStuff ;
 }