第二章

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#include <iostream> using namespace std; class Time { public: void set_time(); void show_time();  private:                  //成员改为公用的int hour; int minute; int sec; }; void Time::set_time()    //在main函数之前定义{  cin>>hour; cin>>minute; cin>>sec; }void Time::show_time() //在main函数之前定义{  cout<<hour<<":"<<minute<<":"<<sec<<endl; } int main() {Time t1;     t1.set_time();     t1.show_time(); return 0; }

<img src="http://img.blog.csdn.net/20150602194220843?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvamlhbmxlZ3VpbGU=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

#include <iostream> using namespace std; class Time {public:  void set_time(void) {cin>>hour; cin>>minute; cin>>sec;}  void show_time(void)  {cout<<hour<<":"<<minute<<":"<<sec<<endl;} private: int hour;int minute; int sec; }; Time t; int main() {  t.set_time(); t.show_time(); return 0; }

<img src="http://img.blog.csdn.net/20150602194951197?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvamlhbmxlZ3VpbGU=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

#include <iostream> using namespace std; class Time {public:  void set_time(void); void show_time(void); private: int hour; int minute; int sec; }; void Time::set_time(void) {cin>>hour; cin>>minute; cin>>sec; } void Time::show_time(void)  {cout<<hour<<":"<<minute<<":"<<sec<<endl;} Time t; int main() { t.set_time(); t.show_time();return 0; }

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