returning pointers from functions

[khiladi]

hiii
can you please tell how to return pointers from functions?

why this code doesn't works?

#include <iostream.h>
char* fn_name(int i)
{
        char c = itoa(i);
        return &c;
}
 
int main()
{
       int i = 10;
       char* ch_ptr;
       ch_ptr = fn_name(i);
       cout<<&ch_ptr<<endl;
}

[Banfa]

Does it compile without errors and warnings?

[Meetee]

hiii
can you please tell how to return pointers from functions?

why this code doesn't works?
#include <iostream.h>
char* fn_name(int i)
{
char c = itoa(i);
return &c;
}

int main()
{
int i = 10;
char* ch_ptr;
ch_ptr = fn_name(i);
cout<<&ch_ptr<<endl;
}

In order to convert an int to string, you can use:

#include <sstream>
 
int i = 5;
string str;
stringstream out;
out << i;
str = out.str();
 

and then cast string to char * c and then return c.

Regards

[khiladi]

In order to convert an int to string, you can use:

#include <sstream>
 
int i = 5;
string str;
stringstream out;
out << i;
str = out.str();
 

and then cast string to char * c and then return c.

Regards

hiii..
tried but not successfull
here is my code
const char* MyClass::Convertinttostring(int i)
{
string str;
stringstream out;
out << i;
str = out.str();
const char* ch = str.c_str();
return ch;
}

and then i use it as-
int i = 65;
const char* ch_ptr = Convertinttostring(i);
char ch = *ch_ptr;

[weaknessforcats]

const char* MyClass::Convertinttostring(int i)
{
string str;
stringstream out;
out << i;
str = out.str();
const char* ch = str.c_str();
return ch;
}

Everyone seems to ignore the fact that you are returning the address of a local variable. str and ch are destroyed when the function completes.

You can never return the address of a local variable.

You cannot return a pointer from a function unless you are sure it will continue to point to an undeleted value when the function returns. Usually, this means you will create your strings on the heap. But when you do that, you are responsible for deleting them, which brings in a bunch of other issues.