朋友函數：需做修改

#include
using namespace std;

class car{
   private:
      int num;
      double gas;
};
void setup(int power)
{int motive=power;
car march;
march.num=200;
march.gas=20.0;
cout<<"--march--\n"<<"傳入為"<cout<<"Gas為"<
int main( )
{    setup(300);
    return 0;
}