update

practical_exercises/10_day_practice/day4/时钟练习题/重载()的时钟.cpp

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+#include <iostream>
+using namespace std;
+class Time{
+private:
+    int hh,mm,ss;
+public:
+    Time(int h=0,int m=0,int s=0):hh(h),mm(m),ss(s){}
+    void operator()(int h,int m,int s) {
+        hh=h;
+        mm=m;
+        ss=s;
+    }
+    void ShowTime(){
+        cout<<hh<<":"<<mm<<":"<<ss<<endl;
+    }
+};
+int main(){
+    Time t1(12,10,11);
+    t1.ShowTime();
+    t1.operator()(23,20,34);	
+    t1.ShowTime();
+    t1(10,10,10);               	
+    t1.ShowTime();
+    system("pause");
+}

practical_exercises/10_day_practice/day4/时钟练习题/重载++的时钟.cpp

@@ -0,0 +1,45 @@
+/*
+设计一个时钟类，能够记录时、分、秒，重载它的++运算符，每执行一次++运算，加时1秒，但要使计时过程能够自动进位。
+*/
+#include<iostream>
+using namespace std;
+class Time{
+    public:
+        Time(int h=0,int m=0,int s=0){
+            hour = h;
+            minute = m;
+            second = s;
+        }
+        void operator++();
+        void showTime(){
+            cout<<"当前时间为："<<hour<<":"<<minute<<":"<<second<<endl;
+        }
+
+    private:
+        int hour,minute,second;
+
+};
+
+void Time::operator++(){
+    ++second;
+    if(second=60){
+        second=0;
+        ++minute;
+        if(minute==60){
+            minute=0;
+            hour++;
+            if(hour==24){
+                hour=0;
+            }
+        }
+    }
+}
+
+int main(int argc, char const *argv[])
+{
+    Time t(23,59,59);
+    ++t;
+    t.showTime();
+    system("pause");
+    return 0;
+}