?? ch19_14.cpp
字號:
//***********************
//** ch19_14.cpp **
//***********************
#include <iostream.h>
#include <iomanip.h>
class RMB{
public:
RMB(double v =0.0)
{
yuan =v; //yuan得到v的整數(shù)部分
jf =(v-yuan)*100.0+0.5;
}
operator double(){ return yuan+jf/100.0; }
void display(ostream& out)
{
out <<yuan <<'.'<<setfill('0') <<setw(2) <<jf //如:8分顯示08
<<setfill(' ');
}
protected:
unsigned int yuan;
unsigned int jf;
};
ostream& operator <<(ostream& oo, RMB& d)
{
d.display(oo);
return oo;
}
void main()
{
RMB rmb(1.5);
cout <<"Initially rmb = " <<rmb <<"\n";
rmb =2.0*rmb;
cout <<"then rmb = " <<rmb <<"\n";
}
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