do while statement

[EwCjE3v7]

Exercise:

Explain each of the following loops. Correct any problems you detect.

(a)

do
        int v1, v2; 
        cout << "Please enter two numbers to sum:";
        if (cin >> v1 >> v2)
            cout << "Sum is: " << v1 + v2 << endl;
while (cin);

But I do now understand what he meant by the cin condition

do {
        int v1, v2; 
        cout << "Please enter two numbers to sum:";
        if (cin >> v1 >> v2)
            cout << "Sum is: " << v1 + v2 << endl;
} while (cin); // how would you fix the cin condition? 

[Disch]

how would you fix the cin condition?

Is there something wrong with it?

[Stephanie16]

Take int v1 and v2 out of the if statement. it should look like this:
cout << "Please enter two numbers to sum:";
cin >> v1 >> v2;
cout << "Sum is: " << v1 + v2 << endl;

Also, how do you want to end the loop?

[nvrmnd]

http://www.cplusplus.com/reference/ios/ios/operator_bool/

[EwCjE3v7]

No this is not my code, its from my book, and would cin even be a condition? like its not getting input to anything. So?

I do not know how they want us to end the loop. Thats the problem

EDIT:

Maybe the cin was for to see if the user wanted another go.

Maybe something like this

string again;
    do {
        int v1, v2;
        cout << "Please enter two numbers to sum:";
        if (cin >> v1 >> v2)
            cout << "Sum is: " << v1 + v2 << endl;
        cin >> string;
    } while (!again.empty() && again[0] != 'n');