Can (::) operator be used for more than 2 variables with same name at different scopes.

Question

If I have a function and in that function I have an if or some other block and I have a global variable i, a variable i local to the function and a variable i local to the if block. Can i use all the variables inside the if block.

Answer 1

" Can (::) operator be used for more than 2 variables with same name at different scopes. "

Scope operator just communicates with global scope variables. No matter how many nested scope you want to include in your code, :: operator can only talk to the global ones.

●● Example ●●

// Global scope
int x = 100;
int y = 200;

int main() {

// Outer scope L0
int x = 10;
int y = 20;

{
// Inner scope L1
int x = 1;
int y = 2;

{
// Inner scope L2
int x = -1;
int y = -2;
cout << "L2 " << ::x << ::y << endl;
}
cout << "L1 " << ::x << ::y << endl;
}
cout << "L0 " << ::x << ::y << endl;
}

Output:
L2 100200
L1 100200
L0 100200

Answer 2

So basically:

int i;

void function () {
int i;
if (...) {
int i;
// invoke all three i here
}
}

... which is as answered in this SO thread.
https://stackoverflow.com/questions/8358628/is-there-any-way-to-access-a-local-variable-in-outer-scope-in-c