/******************************************************************************/
/* */
/* FILE: AUGUST.CPP */
/* */
/* Have you ever seen these operators of the preprocessor ? */
/* ======================================================== */
/* */
/* Compiled and tested with Visual C++ V6.0 */
/* */
/* V1.00 31-AUG-2000 P. Tellenbach http://www.heimetli.ch/ */
/* */
/******************************************************************************/
#include <iostream>
using namespace std ;
#define String(s) #s
#define Concat(a,b) String(a ## b)
#define Main(a,b) \
int main( int argc, char *argv[] ) { \
cout << Concat(a,b) ; \
return 0 ; \
}
Main(Hello world,!)
Update 16. August 2020
The compiler complained that the concatenation operator produced an invalid preprocessor token. I solved this by simply removing the operator, because two adjacent strings are combined to a single one by the compiler.
/******************************************************************************/
/* */
/* FILE: AUGUST.CPP */
/* */
/* Have you ever seen these operators of the preprocessor ? */
/* ======================================================== */
/* */
/* Compiled and tested with Visual C++ V6.0 */
/* */
/* V1.00 31-AUG-2000 P. Tellenbach http://www.heimetli.ch/ */
/* */
/* Compiled and tested with g++ V8.3.0 */
/* */
/* V2.00 16-AUG-2020 P. Tellenbach https://www.heimetli.ch/ */
/* */
/******************************************************************************/
#include <iostream>
using namespace std ;
#define Concat(a,b) #a #b
#define Main(a,b) \
int main( int argc, char *argv[] ) { \
cout << Concat(a,b) ; \
return 0 ; \
}
Main(Hello world,!\n)