// proiect1.cpp : Defines the entry point for the console application.
//


#include<stdio.h>
#include<string.h>
#include<iostream.h>
#include<fstream.h>
#include<conio.h>
#include<iostream>



class String
{
	char *psir;
	int lg;
	void setString(char *s)
	{	psir=new char[strlen(s)+1];
		strcpy(psir,s);
		lg=strlen(s);
	}
	
  public:
	  
	  //constructor de clasa
	String(char *s1="")
	{
		setString(s1);
	}
	  //copy constructor
	String(String &s2)
	{	
		setString(s2.psir);
	}
	  //destructor
	~String()
	{	delete [] psir;}
	static char* abrevieri[];
	static char* neabrev[];
	int operator!();
	friend String operator+(String &, String &);
	friend String operator+(String &, char);
	friend String operator+(String &, char *);
	friend String operator+(char *, String &);
	String &operator+=(char);
	String &operator+=(char *);
	char &operator[](int);
	int operator==(String &);
	int operator!=(String &);
	int operator>(String &);
	int operator<(String &);
	int operator>=(String &);
	int operator<=(String &);
	char *abrev();
	  //iesire de pe fisier standard pe disc
	friend ostream &operator<<(ostream &out, String &s)
	{
		out<<s.psir; return out;	
	}
	  //intrare pe fisier standard pe disc
	friend istream &operator>>(istream &in, String &s)
	{
		cout<<"\n Sirul:";
		in>>s.psir;
		return in;
	}
	  //iesire de pe disc in fisier
	friend ofstream &operator<<(ofstream &fout, String &s)
	{
		fout<<s.psir<<"\tlungime\t"<<s.lg<<"caractere\t"<<endl;
		return fout;
	}
	  //intrare e disc in fisier
	friend ifstream &operator>>(ifstream &fin, String &s)
	{
		char aux[50];
		fin>>aux;
		s.lg=strlen(aux);
		delete s.psir;
		s.psir=new char [s.lg+1];
		strcpy(s.psir,aux);
		return fin;
	}
	  //operatorul cast
	operator char()
	{	return *psir;}
		
	String &operator=(String&);
	
};

	  //test sir vid
	int String::operator!()
	{	
		if(lg==0) return 0;
		else return 1;
	}
	  //concatenarea a doua siruri
	String operator+(String &s1, String &s2)
	{
		String aux;
		aux.lg=s1.lg+s2.lg;
		aux.psir=new char[aux.lg+1];
		strcpy(aux.psir,s1.psir);
		strcat(aux.psir,s2.psir);
		return aux;
	}
	  //concatenarea unui sir cu un caracter
	String operator+(String &s1, char c)
	{
		String aux;
		aux.lg=s1.lg+1;
		aux.psir=new char[aux.lg+1];
		strcpy(aux.psir,s1.psir);
		aux.psir[aux.lg-1]=c;
		aux.psir[aux.lg]='\0';
		return aux;
	}
	  //concatenarea unui sir cu char[]
	String operator+(String &s1, char *sirc)
	{
		String aux;
		aux.lg=s1.lg+strlen(sirc);
		aux.psir=new char[aux.lg+1];
		strcpy(aux.psir,s1.psir);
		strcat(aux.psir,sirc);
		return aux;

	}
	  //concatenarea unui char[] cu un sir
	String operator+(char *sirc, String &s1)
	{
		String aux;
		aux.lg=strlen(sirc)+s1.lg;
		aux.psir=new char[aux.lg+1];
		strcpy(aux.psir,sirc);
		strcat(aux.psir,s1.psir);
		return aux;
	}
	  //concatenarea unui sir existent cu un char 
	String &String::operator+=(char c)
	{
		char *aux;
		aux=new char[lg+1];
		strcpy(aux,psir);
		lg++;
		delete psir;
		psir=new char[lg+1];
		psir=strcpy(psir,aux);
		psir[lg-1]=c;
		psir[lg]='\0';
		delete aux;
		return (*this);
	}
	  //concatenarea unui sir existent cu char[]
	String &String::operator+=(char *sirc)
	{
		char *aux;
		lg=lg+strlen(sirc);
		aux=new char[lg+1];
		strcpy(aux,psir);
		strcat(aux,sirc);
		delete psir;
		psir=new char[lg+1];
		psir=strcpy(psir,aux);
		delete aux;
		return (*this);
	}
	  //extragere caracter
	char &String::operator[](int poz)
	{	poz--;
		if(poz<lg) return psir[poz];
		else {	cout<<"\nSirul nu are atatea caractere!";
				static char err='\0';
				return err;}
	}
	  //comparatii intre siruri
	int String::operator==(String &s1)
	{
		return (strcmp(psir,s1.psir)==0);	
	}
	int String::operator!=(String &s1)
	{
		return (strcmp(psir,s1.psir)!=0);	
	}
	int String::operator>(String &s1)
	{
		return (strcmp(psir,s1.psir)>0);	
	}
	int String::operator<(String &s1)
	{
		return (strcmp(psir,s1.psir)<0);	
	}
	int String::operator>=(String &s1)
	{
		return (strcmp(psir,s1.psir)>=0);	
	}
	int String::operator<=(String &s1)
	{
		return (strcmp(psir,s1.psir)<=0);	
	}
	  //atribuire
	String &String::operator=(String &sir)
	{
		if(&sir!=this) {	delete [] psir;
							lg=sir.lg;
							setString(sir.psir);
						}
		return *this;
		

	}
	char *String::abrevieri[16]={"abs","etc","pt","urm","info","adv","adj","reg","rom","fr","lat","bl","tel","str","jud","cca"};
	char *String::neabrev[16]={"modul","etcetera","pentru","urmator","informatie","adverb","adjectiv","regiune","roman","francez","latin","bloc","telefon","strada","judet","circa"};
	char *String::abrev()
	{
		int i=0,gasit=0;
		while(i<16)
		{
			if(strcmp(psir,neabrev[i])==0) return abrevieri[i];
			else i++;
		}
		return psir;
	}
void main()
{	
	int raspuns;
	do
	{
	system("cls");
	cout<<"\nS-a folosit 1 pentru fals si 0 pentru adevarat!";
	String sir1("alfabet"), sir2("etcetera"),  sir4, sir5, sir; 
	char sir3='a';
	
	cout<<"\n sir1:"<<sir1;
	cout<<"\t sir2:"<<sir2; 
	cout<<"\t sir3:"<<sir3;
	cout<<"\t sir4:"<<sir4;
	cout<<"\t sir5:"<<sir5;
	cout<<"\t sir:"<<sir;
	char c[20];
	cout<<"\n\nSirul introdus de la tastatura:"; cin>>c;
	char d;
	cout<<"\nCaracterul introdus de la tastatura:"; cin>>d;
	int poz;
	//test sir vid
	cout<<"\n Sirul 1 este vid?"<<"\t"<<!sir1;
	cout<<"\nSirul 3 este vid?"<<"\t"<<!sir3;
	//comparatii intre siruri
	cout<<"\nComparatii intre siruri:";
	cout<<"\n sir1==sir3 ?"<<"\t"<<(sir1==sir3);
	cout<<"\n sir4==sir5?"<<"\t"<<(sir4==sir5);
	cout<<"\n sir1!=sir5 ?"<<"\t"<<(sir1!=sir5);
	cout<<"\n sir2<sir3 ?"<<"\t"<<(sir2<sir3);
	//concatenari
	cout<<"\nConcatenari:";
	sir4=sir1;
	sir4=sir4+sir3;
	cout<<"\nConcatenare sir existent cu char sir1+sir3 : "<<sir4;
	cout<<"\nConcatenare a doua siruri existente sir1 + sir2 :"<<sir1 + sir2;
	cout<<"\nConcatenare sir existent cu sir nou sir2 + c :"<<sir2 + c;
	cout<<"\nConcatenare  sir existent cu caracter nou:"<<sir2+d;
	cout<<"\nSirul sir1 este:"<<sir1;
	sir1+=c;
	cout<<"\nConcatenarea a doua siruri folosind operatorul+=:"<<sir1;
	//cast catre caracter prin furnizarea primului element din sir
	cout<<"\nPrimul caracter din sirul sir1:"<<(char)sir1;
	//test pentru extragere caracter
	cout<<"\nPozitia:";cin>>poz;
	cout<<"\nCaracterul de pe pozitia data din sir1 este:"<<sir1[poz];
	cout<<"\nPozitia:";cin>>poz;
	cout<<"\nCaracterul de pe pozitia data din sir1 este:"<<sir1[poz];
	//prescurtarea sirurilor folosind functia abrev();
	cout<<"\nPrescurtarea sirului sir2 este:"<<sir2.abrev();
	cout<<"\nPrescurtare sir1:"<<sir1.abrev();
	//intrare la nivel de fisier
	ofstream fout("fis.txt");
	if(!fout) cout<<"Eroare deschidere fisier!!!";
	fout<<sir1<<c;
	cout<<"\nScriere in fisier:"<<sir1<<"\t"<<c;
	fout.close();
	//iesire la nivel de fisier
	ifstream fin("fis.txt");
	if(!fin) cout<<"Fisier negasit!";
	fin>>sir2;
	cout<<"\nCitire din fisier:"<<c<<"\n";
	fin.close();
	cout<<"\nDoriti sa continuati? (0 pentru nu si 1 pentru da)";
	cin>>raspuns;
	}
	while(raspuns==1);

}