//by 鸟哥 qq1833183060 --
//参考https://docs.microsoft.com/en-us/previous-versions/visualstudio/visual-studio-2012/09dwwt6y(v=vs.110)
// preprocessor_token_pasting.cpp
#include <stdio.h>
#define paster( n ) printf( "token" #n " = %d", token##n )
int token9 = 9;
int main()
{
paster(9);
}
//输出为：token9 = 9
//
其中宏 paster(9) 展开过程为
1、
printf_s( “token” #9 " = %d", token##9 );
2、
printf( “token” “9” " = %d", token9 );
它等价于
printf( “token9 = %d”, token9 );
