Instructions

199 C-Control Pro IDE

Dim str_array(3,40) As Char

Dim Single_str(40) As Char

Single_str="A String"

' will copy Single_str in the second string of str_array

Str_StrCopy(str_array,Single_str,40)

This will work because with a gap of 40 characters after the first string there will in str_array be room

for the second string.

Visibility of Variables

When variables are declared outside of functions then they will have global visibility. I. e. they can be

addressed from every function. Variable declarations within functions produce local variables. Local

variables can only be reached within the function. An example:

Dim a,b As Integer

Sub func1()

Dim a,x,y As Integer

' global b is accessible

' global a is not accessible since concealed by local a

' local x,y is accessible

' u is not accessible since local to function main

End Sub

Sub main()

Dim u As Integer

' global a,b is accessible

' local u is accessible

' x,y u is not accessible since local to function main

End Sub

Global variables have a defined memory space which is available throughout the entire program run.

At program start the global variables will be initialized by zero. Local Variables get not initialized

at the begin of a function!

Local variables will during calculation of a function be arranged on the stack. I. e. local variables ex-

ist in memory only during the time period in which the function is executed.

If with local variables the same name is selected as with a global variable then the local variable will

conceal the global variable. While the program is working in the function where the identically named

variable has been defined the global variable cannot be addressed.

Static Variables

With local variables the property Static can be placed for the data type.