+// retrieveChunk(str,i);
+ th[ii] = thread(retrieveChunk,str, i);
+ }
+
+
+ ind=0;
+
+ for(int ii=0;ii<t;ii++) {
+
+ auto i=myvector[ii];
+ std::cout << myvector[i] << " ";
+
+
+ stringstream ss;
+ ss <<"file_"<<i<<".dat";
+ string str = ss.str();
+ th[ii].join();