C++ Plus Plus Program Simple Operator Overloading in C++, Easy Implementation, Airtime in C++ , C Plus Plus Program

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#include<iostream.h> #include<conio.h> class airtime { private: int hrs,min,sec; public: airtime() : hrs(0),min(0),sec(0){} void settime(); void display(); airtime operator + (const airtime &a); void operator += (const airtime &a); int operator > (const airtime &a); void operator ++ (); void operator ++ (int); }; void airtime::settime() { cout<<"Enter hours min and sec "<<endl; cin>>hrs>>min>>sec; cout<<endl<<endl; } void airtime::display() {cout<<hrs<<":"<<min<<":"<<sec<<"\n"; } airtime airtime::operator + (const airtime &a) { airtime temp; temp.hrs=hrs + a.hrs; temp.min=min + a.min; temp.sec=sec + a.sec; return temp;} void airtime::operator += (const airtime &a) { sec+= a.sec; min+=a.min; hrs+=a.hrs;} int airtime::operator > (const airtime &t) { if(hrs>t.hrs) return 1; else if(min>t.min) return 1; else if(sec>t.sec) return 1; else return 0; } void airtime::operator ++ () { ++hrs; ++min; ++sec; } void airtime::operator ++ (int) { hrs++; min++; sec++; } int main() { airtime a1,a2,a3,a4; int result; a1.settime(); a2.settime(); a3=a1 + a2; a4+=a1; result=a1>a2; if(result==1) cout<<"Time1 is greater than Time 2\n"; else cout<<"Time2 is greater than Time 1\n"; ++a1; a2++; a1.display(); a2.display(); a3.display(); a4.display(); getche(); return 0; }