strange problem

[happiness4all]

#include<iostream>
#include<windows.h>
#include<string>
using namespace std;
 
LPCSTR lp()
{
    string a="hello";
    LPCSTR b;
    b=a.c_str();
    cout<<"\n in lp : "<<b;
    return b;
}
 
int main()
{
    LPCSTR a;
    a=lp();
    cout<<"\n in main : "<<a;
    return 0;
}
 

OUTPUT:
in lp : hello
in main : ╠╠╠╠╠╠╠╠

why is that in main..its not printing correct value?????

[Savage]

#include<iostream>
#include<windows.h>
#include<string>
using namespace std;
 
LPCSTR lp()
{
    string a="hello";
    LPCSTR b;
    b=a.c_str();
    cout<<"\n in lp : "<<b;
    return b;
}
 
int main()
{
    LPCSTR a;
    a=lp();
    cout<<"\n in main : "<<a;
    return 0;
}
 

OUTPUT:
in lp : hello
in main : ╠╠╠╠╠╠╠╠

why is that in main..its not printing correct value?????

Not happening to me,which compiler are u using?

[happiness4all]

i am using vc++.
i figured out why is it so..
but now i want a way to return that pointer value (without using char *)..

[DeMan]

Which (char *) was that?

[happiness4all]

Which (char *) was that?

i didnt get your question..

[happiness4all]

this code with char* instead of lpcstr also does not work.
so how to return the pointer???


#include<iostream>
#include<windows.h>
#include<string>
using namespace std;

const char* lp()
{
string a="hello";
const char* b;
b=a.c_str();
cout<<"\n in lp : "<<b;
return b;
}

int main()
{
const char* a;
a=lp();
cout<<"\n in main : "<<a;
return 0;
}

[DeMan]

Do you get the same problem with :

const char* lp()
{
char b[] = "hello";
cout<<"\n in lp : "<<b;
return b;
}
 

?

[happiness4all]

yes..
but i have got the reason why this is happenning..it is so because we are trying to return the pointer to a local variable which is destroyed once the control goes out of the function so..the pointer gives garbage value..

[DeMan]

Great....That's what we were working toward!! (u can malloc the size instead, or use a static array)

[happiness4all]

Great....That's what we were working toward!! (u can malloc the size instead, or use a static array)

even using malloc inside the local function will give same reuslt..
we can declare the variables globally to overcome this.