c - Infinity loop while reading data from file -

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i'm trying read data file. there 3 rows. i've done below. problem (file exists) infinity loop while reading file. i've observed program not moving line line until reaches end of file. what's incorrect in code?

code:

if (desktops == null) {         printf("\n no such file.\n");     } else{             printf("\nfile exists. reading\n");          while(!feof(desktops)){              if(numberofobjects== 0)             {                  fscanf(desktops,"%fl %fl %fl %fl %d %s %s %d\n",&height,&length,&width,&processorclock,&idnumberserial,&processortypechars,&nameinnetworkchars,&id);                  nameinnetwork = string(nameinnetworkchars);                  processortype = string(processortypechars);                 // nameinnetwork = "test";                  glowalistyobjektow = new desktop(height,length,width,processorclock,idnumberserial,processortype,nameinnetwork,id);                  iterator = glowalistyobjektow;                    iterator->previousobject = null;                  iloscobiektow++;                  nameinnetwork.clear();                  processortype.clear();             }             else if(numberofobjects> 0)             {                 fscanf(desktops,"%fl %fl %fl %fl %d %s %s %d\n",&height,&length,&width,&processorclock,&idnumberserial,&processortypechars,&nameinnetworkchars,&id);                 nameinnetwork = string(nameinnetworkchars);                 processortype = string(processortypechars);                 // nameinnetwork = "test";                 iterator->nextobject = new desktop(height,length,width,processorclock,idnumberserial,processortype,nameinnetwork,id);                   iterator->nextobject->previousobject = iterator;                 iterator = iterator->nextobject;                 iloscobiektow++;                  nameinnetwork.clear();                  processortype.clear();                 // nameinnetworkchars = null;             }                cout<<"reading line"<<endl; // here line above printed infinitely.         }             fclose(desktops);     }

problems see.

  1. you using wrong format, %fl instead of %lf.
  2. you not checking whether fscanf read data or not.

change

 fscanf(desktops,"%fl %fl %fl %fl %d %s %s %d\n", &height, &length, &width, &processorclock, &idnumberserial, &processortypechars, &nameinnetworkchars, &id);

to

 int n = fscanf(desktops,"%lf %lf %lf %lf %d %s %s %d\n", &height, &length, &width, &processorclock, &idnumberserial, &processortypechars, &nameinnetworkchars, &id);  if ( n != 8 )  {     // deal error condition  }

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