c++ - Constructor with a array type of another class -

this photo of model have resolve:

i have class:

#include<iostream> #include<fstream> using namespace std;  class word { protected: char *value; char type[20]; int nochars; static int nowords;  public: word(char *value, char *type) {     this->nochars = 0;     this->value = new char[strlen(value) + 1];     strcpy(this->value, value);     strcpy(this->type, type);     word::nowords++; } word() {     this->nochars = null;     this->value = null;     strcpy(this->type,"nedeterminat"); } void operator=(word &x) {     this->nochars = x.nochars;     strcpy(this->type, x.type);     this->value = new char[strlen(x.value) + 1];     strcpy(this->value, x.value); } word(const word& x){     this->nochars = x.nochars;     strcpy(this->type, x.type);     this->value = new char[strlen(x.value) + 1];     strcpy(this->value, x.value);    } char* getvalue() {     return this->value; } void settype(char* x) {     if (x == null)     {         throw new exception("tip gresit!");      }     else     {         strcpy(this->type, x);     } } char &operator[](int i) {     if (i >= 0 && <= (strlen(this->value) - 1))     {         return this->value[i];     }     else         cout << endl << "eroare indice: " << i; } static int getnowords() {     return word::nowords; } operator int() {     return this->nochars; } friend ostream& operator<<(ostream&, word&); friend istream& operator>>(istream&, word&); }; ostream& operator<<(ostream& consola, word& x) { consola << "value: " << x.getvalue() << endl; consola << "type: " << x.type << endl; consola << "nochars: " << x.nochars << endl; return consola; } istream& operator>>(istream& consola, word& x){ cout << "value: "; consola >> x.value; cout << "type: "; consola >> x.type; cout << "nochars: "; consola >> x.nochars; return consola; }  int word::nowords = 0;  class dictionary{ private: char *language; int nowords; bool isonline; word v[100]; public: dictionary(char *language, word w, int nowords, bool isonline)   {     this->language = new char[strlen(language) + 1];     strcpy(this->language, language);     (int = 0; < 100; i++)     {         this->v[i] = w;     }     this->nowords = nowords;     this->isonline = isonline; } }; int main() { //1 word w1("exam", "noun"); /*word w2;*/ word w3 = w1; cout << w3; //2 cout << endl << "word value: " << w3.getvalue(); word w2("to take", "noun"); w2.settype("verb"); //3 w3 = w2; cout << endl << w3; word *pw = new word("pointer", "noun"); delete pw; //4 cin >> w3; cout << w3; char character = w3[2]; cout << endl << character; //5 double nochars = (int)w1; cout << endl << nochars; cout << endl << word::getnowords() << endl; //6 dictionary dictionary1("english", null, 0, false); } 

i have main:

dictionary dictionary1("english", null, 0, false); 

how should change constructor work? receive error :

arrgument types are:(const char[8],int,int,bool); 

and how should write default constructor?

1. null cannot assigned word. try word() instead call default constructor word. consider changing function parameter const word& - anonymous temporaries allowed bind const references.

2. i'd prefer see std::string type member variable language; using const std::string& function parameter. not have worry subsequent delete call, , defining own assignment operators , copy constructors. currently, class leaks memory.