how refer to a local variable share same name of a global variable in C? [duplicate]

问题

This question already has answers here:

How to print value of global variable and local variable having same name? (4 answers)

Closed 2 years ago.

for example

#include<stdio.h>

int foo = 100;

int bar()
{
    int foo;
    /* local foo = global foo, how to implemented? */
    return 0;
}

int main()
{
    int result = bar();
    return 0;
}

I think in the function bar, calling foo directly will just get the global foo. How can I refer the local foo? I know in C++, there is this pointer. However, does C has something similar?

Thanks a lot!

回答1:

No, by declaring foo in bar(), you have taken the global foo out of scope. Inside bar() when you refer to foo you get the local variable.

来源：https://stackoverflow.com/questions/5827447/how-refer-to-a-local-variable-share-same-name-of-a-global-variable-in-c