c++ - Segmentation fault on return -


i segmentation fault on return of function (inside last for), , have no idea why (i'm going crazy, because can't make sense out of problem).

frase global variable. function copy of function works , modified last (i write comment before show better). if function returns @ line {cout<<"404 "<<endl;return 404;} no error. hope have explained that's necessary.

int funzione_principale() {     //string frase;     char frase_char [1024]={'\0'};     char frase_elaborata [1024]={'\0'};      playsound(text("avviso.wav"), null, snd_filename);     rec(); //registro l' audio     while(active)         sleep(50); // here wait other function complete!     if(frase.length()<=14)     {         cout<<"404 "<<endl;return 404;     }     frase.copy(frase_char,frase.length()-57,56);     for(int k=0; frase_char[k]!='"';k++)     {         frase_elaborata[k]=frase_char[k];     }     //tramite fparole otteniamo il numero di parole contenute nella frase_elaborata     righe=fparole(frase_elaborata);     //manipolazione delle parole nelal frase tramite matrice     char matrice [righe][27];     for(int x=0;x<=righe;x++)         memset(matrice[x],0,27);     int conto=0;     int indice=0;     int riga=0;     int lunghezza=strlen(frase_elaborata);     minuscole_accenti(frase_elaborata);     cout<<"frase tradotta: "<<frase_elaborata<<endl;     while (frase_elaborata[conto]!='\0')     {         if(frase_elaborata[conto]>=97 && frase_elaborata[conto]<=122)         {             matrice[riga][indice]=frase_elaborata[conto];             indice++;         }         if(frase_elaborata[conto]>=48 && frase_elaborata[conto]<=57)         {             matrice[riga][indice]=frase_elaborata[conto];             indice++;         }         if(frase_elaborata[conto]==' ' && conto!=lunghezza-1 && frase_elaborata[conto+1]!=' ')         {             matrice[riga][indice]='\0';             indice=0;             riga++;         }         conto++;     }     //adesso la matrice contiene num righe con ogniuna, una parola della frase     cout<<"frase presente nella matrice: "<<endl;     for(int x=0;x<=righe;x++)         cout<<matrice[x]<<endl;      // here modified function !      for(int t=0;t<=righe;t++)     {         if(strcmp(matrice[t],"s")==0)         {return 1;}         if(strcmp(matrice[t],"si")==0)         {return 1;}         if(strcmp(matrice[t],"affermativo")==0)         {return 1;}         if(strcmp(matrice[t],"ok")==0)         {return 1;}         if(strcmp(matrice[t],"certo")==0)         {return 1;}          if(strcmp(matrice[t],"no")==0)         {return -1;}         if(strcmp(matrice[t],"negativo")==0)         {return -1;}          if(strcmp(matrice[t],"dopo")==0)         {return 0;}         if(strcmp(matrice[t],"rimanda")==0)         {return 0;}         if(strcmp(matrice[t],"rimandalo")==0)         {return 0;}         if(strcmp(matrice[t],"non")==0 && strcmp(matrice[t+1],"ora")==0)         {return 0;}         if(strcmp(matrice[t],"chiedi")==0 && strcmp(matrice[t+1],"dopo")==0)         {return 0;}         if(strcmp(matrice[t],"chiedimelo")==0 && strcmp(matrice[t+1],"dopo")==0)         {return 0;}      }     return 404; }

you have problem in 2 places (same problem). for loop runs 0 righe inclusive, , twice. 1 time write illegal memory space (for(int x=0;x<=righe;x++) memset(matrice[x],0,27);), , 2nd time read it. should for(int x=0;x<righe;x++).


Comments

Post a Comment

Popular posts from this blog

Email notification in google apps script -

https://support.google.com/docs/answer/91588?hl=en i have sheet the cells filled in data pulled via apps script, website. pull in exact same data, not. on old sheets version use able emails when data "changes" different value. new sheets, email when new data pasted cells, though exact same data......and, can't set @ ranges anymore, entire document. there easy way watch cells when data changes, , email myself? this looks lot you're trying do. for checking whether value has changed after edit, this gives necessary information it. hence, know whether new value same 1 or not. implementing "workaround" talked in second link, able compare , send email myself if value changed. initiate onedit trigger goes off onedit function uses these lines after checks in place have passed. var email = "xyz@whatever.com"; mailapp.sendemail(email, "triggermail", "a change has occurred in sheet"); note: sends "notification...
Read more

c++ - Difference between pre and post decrement in recursive function argument -

i have following sample code used pre-decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(--c); cout << c << endl; return; } } this function give output input 4 : dp3 dp2 dp1 dp0 0 1 2 3 but when use post decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(c--); cout << c << endl; return; } } output goes in infinite loop dp4 can explain me in detail why happens ? this happens because function(c--) called same value of c , when finishes c decremented. recursively called, hence called same value no chance of return , hit stack overflow error. assume this, int x = 1, y = 0; y = x++ result y == 1 , x == 2. if y = ++x , bot x , y 2.
Read more

javascript - IE11 incompatibility with jQuery's 'readonly'? -

the code i'm running has no issues in firefox, or chrome. user typing 1 textbox, tabs next , can continue typing that. when run webpage on ie11, user tabs next textbox , can't type in. textbox has double-clicked before user can insert anything. i've googled , seems ie give problems when using older jquery (i.e. prefers 'prop' 'attr' ). in code below jquery's readonly keyword being used in way ie11 no longer recognise/accept? i assume issue readonly , removeclass('ignore') working expected. //when focus on textbox 1 $("#field1").focus(function() { //remove readonly property textbox 1 $('#field1').prop('readonly', false).removeclass('ignore'); //add readonly property other textboxes $('#field2, #field3, #field4') .prop('readonly', 'readonly').addclass('ignore').val(''); }); i'm using jquery 2.1.3 ...
Read more