ui64.cpp

/*
 * ui64.cpp
 *
 */
#include <iostream>
#define UINT64_C(C) C##ui64


int
main(int argc, char *argv[])
{
	uint64_t x, a = 42;
	x = std::max(a, UINT64_C(41));
	std::cout << x << std::endl;
	return (0);
}

% g++ ui64.cpp 
ui64.cpp:13:1: error: invalid suffix "ui64" on integer constant