Error: no match for 'operator=' in 'std::cout.std::basic_ostream

Question

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Given the following code:
int number = 49;

what will the output be after the following statements are executed?

C++

if(number >= 50)
cout << "yes" << endl;
cout << number = number + 1;

[added]
What will be the output? 50 or Yes 50?
[/added]

What I have tried:

C++

#include <iostream>
using namespace std;

int main ()

{
    int number = 49;

    if ( number >= 50)
    {
        cout << "Yes " << endl;
        cout << number = number + 1;
    }

}

Posted 4-Aug-17 17:32pm

Member 13346994

Updated 9-Aug-17 13:10pm

CPallini

v2

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CPallini · Answer 1 · 2017-08-05T02:55:00

Quote:
cout << number = number + 1;

This statement is wrong (as the compiler noticed :-) ), because the insertion operator has higher precedence than the assignment one.

The following program

C++

#include <iostream>
using namespace std;

int main()
{
  int number = 49;

  if ( number >= 50)
    cout << "Yes " << endl;
  cout << (number = number + 1);
}

outputs just 50.

Patrice T · Answer 2 · 2017-08-09T13:10:00

Solution 4

The output od this code:

C++

#include <iostream>
using namespace std;
int main ()
{
    int number = 49;
    if ( number >= 50)
    {
        cout << "Yes " << endl;
        cout << (number = number + 1);
    }
}

is nothing as I understand this code.

Posted 9-Aug-17 13:10pm

Patrice T