Pausing and resuming for loop c++

Question

I would like to know is there a way to to return back to the last iteration of the for loop, after the break and continue from there, for ex.:

void loop()
{
    for (n ; n<10; n++)
        if (n=5) { break; }
}

// code

loop();  // should start from 6 ...

loop here is a function which has a loop... If you want to keep state between function invocations you should use a static variable although it won't be thread safe: — smichak, Jun 21 '15 at 11:22
possible duplicate of [Equivalent C++ to Python generator pattern](http://stackoverflow.com/questions/9059187/equivalent-c-to-python-generator-pattern) — Dunes, Jun 21 '15 at 11:23
Seems a strange construct:) Anyway, if you want to do such stuff, use a while loop with an explicit counter, initialized before the loop. — Martin James, Jun 21 '15 at 11:23

score 1 · Answer 1 · answered Jun 21 '15 at 11:24

Write a class:

class my_loop
{
    int i;
public:
    my_loop(): i(0) {}
    void loop_some()
    {
        while (i != some_limit)
            ...
    }
};

The instance of the class contains the necessary info for running the loop. You can return from loop_some() and call it again when necessary.

score 0 · Answer 2 · answered Jun 21 '15 at 14:57

Declare n as a static variable, (static int n=0) so it retains its value and use continue instead of break.

void loop()
 {
      static int n=0;
      for (; n<10; n++){

          if (n==5  ){  

             cout<<"  n = 5   "; 
             continue; 
          }

            cout<<""<<n<<" ";
       }

}

Output:

0 1 2 3 4   n = 5   6 7 8 9
 Press any key to continue

score -1 · Answer 3 · edited May 23 '17 at 10:28

-1

What i could think of would be to use goto to to leave and go back into your loop. But you should try to avoid this because it leads to very difficult readable code. Here are two links which could help to decide:

Use goto or not

Statements and flow control

edited May 23 '17 at 10:28

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answered Jun 22 '15 at 17:50

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Pausing and resuming for loop c++

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