#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/*
 * 1) ĺһǸ
  2) ΪͨԺǿ׳Ҫ󣬲ܶԿʹκμ
 */
#define PRINT_GREETINGS do { \
    printf("Hi there!\n"); \
} while (0)

int main(const int argc, const char* const* argv)
{
    // macro
    PRINT_GREETINGS;

    return 0;
}

Add ANSI C code snippet.
Add ANSI C code snippet.
