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#include <iostream>
#include <cstring>
#include <sstream>

using namespace std;

class MyString{
private:
char *_string;
public:
MyString(): _string((char*)malloc(sizeof(char))){}
MyString(const char *s): _string((char *)malloc(strlen(s)*sizeof(char)))
{memcpy(_string,s,strlen(s));}

char *get_string() const {
return _string;
}

void set_string(char *s)
{
_string=(char *)realloc(_string,strlen(s)*sizeof(char));
}

MyString add(const MyString &s) const
{
MyString nstr(strncat(this->get_string(),s.get_string(),strlen(s.get_string())));
return nstr;
}
MyString add(const char *s) const
{
MyString inpts(s);
MyString nstr(this->add(inpts));
return nstr;
}

int index(char c) const
{
return strchr(this->get_string(),c)-(this->get_string())+1;
}
int index(const MyString &s) const
{
return strstr(this->get_string(),s.get_string())-(this->get_string())+1;
}
int index(const char *s) const
{
MyString inpts(s);
return this->index(inpts);
}

char get_symbol(int index) const
{
return this->get_string()[index-1];
}

MyString substring(int start, int end) const
{
start--; end--;
char s2[end-start+1];
strncpy(s2,&(this->get_string()[start]),end-start+1);
MyString nstr(s2);
return s2;
}

void print() const
{
cout<<this->get_string()<<endl;
}

~MyString(){free(this->get_string());}
};

int main()
{
MyString s1;
MyString s2("Petka Mokry");
MyString s3("BOB");

s1.add(" ABOBA");
s2.add(s1).print();

cout<<"Позиция символа 'M' в строке 2: "<<s2.index('M')<<endl;
char *scheck=(char*)malloc(4*sizeof(char));
strncpy(scheck,"BOB",4);
cout<<"Позиция подстроки "BOB" в строке 1: "<<s1.index(scheck)<<endl;
cout<<"Символ с позиции 4 в строке 2: "<<s2.get_symbol(4)<<endl;
cout<<"Подстрока с позиции 1 до позиции 5 в строке 2: ";
s2.substring(1,5).print();
free(scheck);
return 0;
}
     
 
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