Global variables

petermeisenstein

How to set a variable global

Hector1945

all variables are global by default, except the ones in functions

petermeisenstein

@Hector1945 And if I want to use them in functions?

PB____

If you have declared the variable outside of the function, before using it in the function, it is global.

For example:

int myVariable = 0; // This variable is now declared in the global scope (and I assigned the value 0)
function setMyVariable(value)
    myVariable = value // assign a new value to myVariable
return value
print(myVariable, "\n") // prints 0
int returnValue = setMyVariable(1)
print(returnValue, "\n") // prints 1
print(myVariable, "\n") // prints 1

if you want to make sure the variable is scoped to the function only, you need to declare it in the function:

int myVariable = 0; // This variable is now declared in the global scope (and I assigned the value 0)
function setMyVariable(value)
    int myVariable = value // by beginning with the type, I'm declaring a new variable at the scope of the function (and I assign value to it)
return myVariable
print(myVariable, "\n") // prints 0
int returnValue = setMyVariable(1)
print(returnValue, "\n") // prints 1
print(myVariable, "\n") // still prints 0

petermeisenstein

@PB____ Thanks

petermeisenstein

Is this pseudo code ?

PB____

No, not really, but I did accidentally used a ; on the first line. If you remove that, it should work.

petermeisenstein

@PB____ C++ left the chat