ex4_12.cpp

c++编写的关于课程管理系统的软件

// Note:Your choice is C++ IDE
#include "iostream.h"
#define N 10
void main()
{
	#ifdef N>0
      cout <<"N>0"<<endl;
    #elif  N<0
      cout <<"N<0"<<endl;
    #else
      cout <<"N=0"<<endl;
    #endif
    
}