Re: Need Help Reg : Overloading assignment Operator,Coppy constructor

[Hasani Blackwell]

OK, I wrote code.
1) I made the default constructor call the constructor with the signature MyClass(Int, char*)
2) I removed the default argument statements from the constructor with the signature MyClass(Int, char*)

http://www.estorecorp.com/mysql/myclass.html

So you'll be able to create stack variables using the default constructor.


#include<stdio.h>
#include<windows.h>
//
class MyClass
{
public:
MyClass();
MyClass(INT strlen , CHAR * str );
MyClass(MyClass const & A);
MyClass& operator= (MyClass const & A);
~MyClass();
private:
INT stringlen;
CHAR *mystring;
};

MyClass::MyClass()
{
MyClass(0, "");
}

MyClass::~MyClass()
{
//if( mystring )
// free(mystring);
}

MyClass::MyClass(MyClass const &A)
{
stringlen = strlen( A.mystring );
mystring = new char[ stringlen+1 ];
strcpy( mystring, A.mystring);
}

//assignement operator
MyClass& MyClass::operator= (MyClass const &A)
{
if ( this != &A )
{
delete [] this->mystring;
this->mystring = new char[strlen(A.mystring)];
strcpy( this->mystring, A.mystring);
}
return *this;
}

MyClass::MyClass( INT strlen1 , CHAR * str)
{
stringlen = strlen( str );
mystring = (CHAR*) calloc( sizeof( CHAR ), stringlen + 1);
strcpy ( mystring, str );
}

void main()
{
MyClass M1(6,"sarat");
MyClass M2 = M1;
MyClass M3(M2);
MyClass M4(6,"sarat");
M4 = M1;

CHAR *str, *str1 = "sarat";
str = ( CHAR* ) calloc ( sizeof (CHAR), 10);
strcpy( str,"sarat");
str[2]= 's';// shud work
printf("%d %d ",strlen(str),strlen(str1));
//str1[2]= 's'; will not work coz we assigned a constant
printf("%s %s", str, str1);
}