Will a value live perpetually when there's no reference to it?

Question

Suppose the following minimal code:

#include 
char character = \'c\';
int main (void)
{
    char character = \'b\';
    printf(\"The current value         


        

Answer 1

After the declaration of character in main, any reference to character in that function refers to that one, not the one at global scope. We call this shadowing.

As for the effect on memory, you can't say due to the as-if rule adopted by the language: a compiler might optimise to

#include 
int main()
{
     printf("The current value of head is b");
}

for example.