Four weeks procedure fill in the blanks question 2

4W4: Fourth week procedure fill in the blanks question 2

Description

The following Myint class has only one member variable. Some of the code inside the Myint class is hidden. Suppose the following program can be compiled and the output result is:

4,1

Please write out the hidden parts. (The content you write must be all within the Myint class, and static variables are not allowed in Myint member functions).

#include <iostream>

using namespace Std;

Class MyInt {

int nval;

Public

MyInt (int n) {nval = n;}

int ReturnVal () {return nval;}

Add your code here

};

int main () {

MyInt Objint (10);

Objint-2-1-3;

cout << objint.returnval ();

cout << ",";

objint-2-1;

cout << objint.returnval ();

return 0;

}

input

No

Output

4,1

Sample Input

No

Sample Output

4,1

The idea of solving problems: To change the value of private members within a class, you must use a reference or a pointer. You should add & to your situation before operator. Overloading as a member function means that the number of parameters is the number of operators minus one, namely:

#include <iostream>

using namespace Std;

Class MyInt {

Intnval;

Public

MyInt (INTN) {nval = n;}

Intreturnval () {return nval;}

Add your code here

Myint&operator-(int s)

{

nval-= s;

Return*this;

}

};

int main () {

Myintobjint (10);

ObjInt-2-1-3;

cout<< Objint.returnval ();

cout<< ",";

ObjInt-2-1;

cout<< Objint.returnval ();

Return0;

}