// m13_externs.h #ifndef M13_EXTERNS_H_INCLUDED_ #define M13_EXTERNS_H_INCLUDED_ #include <iostream> extern "C" int m13_left_operand; extern "C" int __stdcall m13_calculate( int arithmetic_command, int right_operand ); // Defined in m13_calculator.asm extern "C" void __stdcall print_error( char const* error_msg ); // Defined in m13_externs.cpp #endif // M13_EXTERNS_H_INCLUDED_