/*烟台大学计算机学院学生 *All right reserved. *文件名称*烟台大学计算机学院学生 *All right reserved. *文件名称:对象前置++,前置--;后置++,后置-- *作者:杨飞 *完成日期:2014年4月11日 *版本号:v1.0 *对任务及求解方法的描述部分:项目一:对象前置++,前置--;后置++,后置-- *我的程序:*/ #include <iostream> using namespace std; class CTime { private: int hour; // 时 int minute; // 分 int second; // 秒 public: CTime(int h=0,int m=0,int s=0); void setTime(int h,int m,int s); void display(); //二目的比较运算符重载 bool operator > (CTime &t); bool operator < (CTime &t); bool operator >= (CTime &t); bool operator <= (CTime &t); bool operator == (CTime &t); bool operator != (CTime &t); //二目的加减运算符的重载 //返回t规定的时、分、秒后的时间,例t1(8,20,25),t2(11,20,50),t1+t2为:41:15 CTime operator+(CTime &t); CTime operator-(CTime &t);//对照+理解 CTime operator+(int s);//返回s秒后的时间 CTime operator-(int s);//返回s秒前的时间 //二目赋值运算符的重载 CTime operator+=(CTime &c); CTime operator-=(CTime &c); CTime operator+=(int s);//返回s秒后的时间 CTime operator-=(int s);//返回s秒前的时间 CTime operator++(int);//后置++ CTime operator++();//前置++ CTime operator--(int);//后置-- CTime operator--();//前置-- }; CTime::CTime(int h,int m,int s) { hour=h; minute=m; second=s; } void CTime::setTime(int h,int m,int s) { hour=h; minute=m; second=s; } void CTime::display() { cout<<hour<<":"<<minute<<":"<<second<<endl; } bool CTime::operator > (CTime &t) { if (hour>t.hour) return true; if (hour<t.hour) return false; if (minute>t.minute) return true; if (minute<t.minute) return false; if (second>t.second) return true; return false; } bool CTime::operator < (CTime &t) { if (hour<t.hour) return true; if (hour>t.hour) return false; if (minute<t.minute) return true; if (minute>t.minute) return false; if (second<t.second) return true; return false; } bool CTime::operator >= (CTime &t) { if(*this<t) return false; return true; } bool CTime::operator <= (CTime &t) { if(*this>t) return false; return true; } bool CTime::operator == (CTime &t) { if(hour==t.hour&&minute==t.minute&&second==t.second) return true; else return false; } bool CTime::operator != (CTime &t) { if(*this==t) return false; return true; } CTime CTime::operator+(CTime &t) { int h,m,s; s=second+t.second; m=minute+t.minute; h=hour+t.hour; if (s>59) { s-=60; m++; } if (m>59) { m-=60; h++; } if (h>23) h-=24; CTime t3(h,m,s); return t3; } CTime CTime::operator-(CTime &t) { int h,m,s; s=second-t.second; m=minute-t.minute; h=hour-t.hour; if (s<0) { s+=60; m--; } if (m<0) { m+=60; h--; } if (h<0) h+=24; CTime t3(h,m,s); return t3; } CTime CTime::operator+(int s) { int s1=s%60; int m1=s/60; int h1=s/3600; CTime t3(h1,m1,s1); return *this+t3; } CTime CTime::operator-(int s) { int s1,m1,h1; s1=s%60; m1=s/60; h1=s/3600; CTime t3(h1,m1,s1); return *this-t3; } CTime CTime::operator+=(CTime &c) { *this=*this+c; return *this; } CTime CTime::operator-=(CTime &c) { *this=*this-c; return *this; } CTime CTime::operator+=(int s)//返回s秒后的时间 { *this=*this+s; return *this; } CTime CTime::operator-=(int s)//返回s秒前的时间 { *this=*this-s; return *this; } CTime CTime::operator++(int) { CTime temp(*this); second++; if(second>59) { second-=60; minute++; } if(minute>59) { minute-=60; hour++; } if(hour>23) { hour-=24; } return temp; } CTime CTime::operator++() { ++second; if(second>59) { second-=60; minute++; } if(minute>59) { minute-=60; hour++; } if(hour>23) { hour-=24; } return *this; } CTime CTime::operator--(int) { CTime temp(*this); second--; if (second<0) { second+=60; minute--; } if (minute<0) { minute+=60; hour--; } if (hour<0) hour+=24; return temp; } CTime CTime::operator--() { --second; if (second<0) { second+=60; minute--; } if (minute<0) { minute+=60; hour--; } if (hour<0) hour+=24; return *this; } int main() { CTime t1(10,20,25),t2(6,20,45),t; cout<<"t1为:"; t1.display(); cout<<"t2为:"; t2.display(); cout<<"下面比较两个时间大小:\n"; if (t1>t2) cout<<"t1>t2"<<endl; if (t1<t2) cout<<"t1<t2"<<endl; if (t1==t2) cout<<"t1=t2"<<endl; if (t1!=t2) cout<<"t1不等于t2"<<endl; if (t1>=t2) cout<<"t1大于或等于t2"<<endl; if (t1<=t2) cout<<"t1小于或等于t2"<<endl; cout<<endl; t=t1+t2; cout<<"两个时间相加处理后的时间;"<<endl; t.display(); t=t1-t2; cout<<"两个时间相减处理后的时间;"<<endl; t.display(); cout<<"+600秒处理后的时间;"<<endl; t=t1+600; t.display(); cout<<"-400秒处理后的时间;"<<endl; t=t1-400; t.display(); cout<<"加上一个时间赋予本身"<<endl; t1+=t2; t1.display(); cout<<"减去一个时间赋予本身"<<endl; t1-=t2; t1.display(); cout<<"加600秒赋予本身"<<endl; t1+=600; t1.display(); cout<<"减600秒赋予本身"<<endl; t1-=600; t1.display(); cout<<"前置++的结果:"<<endl; ++t1; t1.display(); cout<<"前置--的结果:"<<endl; --t1; t1.display(); cout<<"后置++的结果:"<<endl; t1++; t1.display(); cout<<"后置--的结果:"<<endl; t1--; t1.display(); return 0; }
运行结果:
心得体会:真的体会了