Load the Input / Output operator stack in C ++

C ++ is able to input and output existing data types by using thread extraction operators >> and thread insertion operators <

Here, it is important to create an operator overloading function for a friend of the class, because it will be called without creating an object.

The following example explains how to overload thread extraction operators >> and thread insertion operators << in C ++ :.

 #include using namespace std ; class KhoangCach { private : int met ; int centimet ; public : // phan khai bao cac constructor can thiet KhoangCach (){ met = 0 ; centimet = 0 ; } KhoangCach ( int m , int c ){ met = m ; centimet = c ; } friend ostream & operator <<( ostream & output , const KhoangCach & K ) { output << "nDo dai bang m la: " << K . met << "nVa do dai bang cm la: " << K . centimet ; return output ; } friend istream & operator >>( istream & input , KhoangCach & K ) { input >> K . met >> K . centimet ; return input ; } }; int main () { KhoangCach K1 ( 23 , 14 ), K2 ( 14 , 35 ), K3 ; cout << "Nhap gia tri cua doi tuong K3: " << endl ; cin >> K3 ; cout << "Khoang cach dau tien: " << K1 << endl ; cout << "n==========================n" << endl ; cout << "Khoang cach thu hai: " << K2 << endl ; cout << "n==========================n" << endl ; cout << "Khoang cach thu ba: " << K3 << endl ; return 0 ; } 

Compiling and running the above C ++ program will produce the following results:

According to Tutorialspoint

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