如何使用具有（this）作为变量名的.h文件到CPP文件中

Question

I have a header my.h which have following declaration of a function named as my_func.

#pragma once
void my_func (int *this);

this function is implemented in my.c

void my_func (int *this)
{
  printf("%d", *this);
}

in foo.cpp i want to use my_func

extern "C"
{
    #include <foo.h>
}

but i am getting following error error: expected ')' void my_func (int *this); Actually in my project this used/manipulated in.C/.h files many place. this is used as variable in those header/.c files many place. I just took the above example for simplicity purpose to describe the compile error i am facing.

Answer 1

this is a keyword in c++. You cannot use it as a variable. You can simply rename it to something else in the header.

In fact, you can even remove the variable name completely. The compiler won't care. Named arguments are there to tell developers what the argument is meant to represent. It does not inform the compiler of anything.