mirror of
https://gitlab.com/fbb-git/cppannotations
synced 2024-11-16 07:48:44 +01:00
56c3880916
git-svn-id: https://cppannotations.svn.sourceforge.net/svnroot/cppannotations/trunk@252 f6dd340e-d3f9-0310-b409-bdd246841980
27 lines
1 KiB
Text
27 lines
1 KiB
Text
bf(C++) introduces several new operators, among which the
|
|
i(scope resolution operator) (ti(::)). This operator can be
|
|
used in situations where a global variable exists having the same name as a
|
|
local variable:
|
|
verb(
|
|
#include <stdio.h>
|
|
|
|
int counter = 50; // global variable
|
|
|
|
int main()
|
|
{
|
|
for (int counter = 1; // this refers to the
|
|
counter < 10; // local variable
|
|
counter++)
|
|
{
|
|
printf("%d\n",
|
|
::counter // global variable
|
|
/ // divided by
|
|
counter); // local variable
|
|
}
|
|
}
|
|
)
|
|
In the above program the scope operator is used to address a global
|
|
variable instead of the local variable having the same name. In bf(C++) the
|
|
scope operator is used extensively, but it is seldom used to reach a global
|
|
variable shadowed by an identically named local variable. Its main purpose
|
|
is described in chapter ref(Classes).
|