C++语言基础 例程 带默认参数的构造函数

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使用默认参数的构造函数

#include <iostream> using namespace std; class Time { public: Time( ); Time(int h,int m=0,int s=0); void show_time( ); private: int hour; int minute; int sec; }; Time::Time( ) { hour=0; minute=0; sec=0; } Time::Time(int h,int m,int s) { hour=h; minute=m; sec=s; } void Time::show_time( ) { cout<<hour<<":"<<minute<<":"<<sec<<endl; } int main( ) { Time t1; t1.show_time(); Time t2(8); t2.show_time(); Time t3(8,30); t3.show_time(); Time t4(18,56,48); t4.show_time(); return 0; }