Reading m words from a paragraph from n thread ? C++ multithreading ? Not working?
<p>I want read a paragraph by extracting one word at a time using Multithreading . Each thread should read exactly one word and when paragraph ends they should exit peacefully . I know threads shouldn't be used in this way as there is no advantage in that . But I want to do that so that I can check how threads can work sequentially if required . I tried but it looks like the program is reaching deadlock state and not giving any output at all . There are 11 words in the string and I am using 4 threads .</p>

<pre><code>#include &lt;iostream&gt;
#include &lt;mutex&gt;
#include &lt;sstream&gt;
#include &lt;thread&gt;
#include &lt;chrono&gt;
#include &lt;condition_variable&gt;
using namespace std;
stringstream s("Japan US Canada UK France Germany China Russia Korea India Nepal");
int count = 0;
string word;
condition_variable cv;
mutex m;
int i = 0;
bool check_func(int i,int k)
{
    return i == k;
}
void print(int k)
{
  while(count &lt; 11)   // As there are 11 words
  {
     unique_lock&lt;mutex&gt; lk(m);
     int z = k;
     cv.wait(lk,[&amp;]{return check_func(i,z);});            // Line 33
     s &gt;&gt; word;
     cout&lt;&lt;word&lt;&lt;" ";
     i++;
     cv.notify_all();
     count++;
  }
   return;
}
int main() 
{
    thread threads[4];
    for(int i = 0; i &lt; 4; i++)
       threads[i] = thread(print,i);
    for(auto &amp;t : threads)
       t.join();
    return 0;
}
</code></pre>