C++ Program find if file exists of not

In this post we will see how to write a C++ code to check if the file exists in the file system or not.
To find if the file exists or not we will use the stat structure from sys/types.h library (#include <sys/types.h>).
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The basic signature for stat is shown below.

So lets See an example to check if a file exist using standard C++/C++11
C++: Check if file exists: