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This is one of the few uses of C++ macros that is widely accepted. It is usually called an include guardinclude guard. As an alternative, most modern compilers support #pragma once. This is much cleaner, but slightly less portable.
This is one of the few uses of C++ macros that is widely accepted. It is usually called an include guard. As an alternative, most modern compilers support #pragma once. This is much cleaner, but slightly less portable.
This is one of the few uses of C++ macros that is widely accepted. It is usually called an include guard. As an alternative, most modern compilers support #pragma once. This is much cleaner, but slightly less portable.
This is one of the few uses of C++ macros that is widely accepted. It is usually called an include guard. As an alternative, most modern compilers support #pragma once. This is much cleaner, but slightly less portable.
