allocation problem

[SSJBardock]

please help me, I'm rewriting a program I made before because I lost the
source and I want to allocate a number of text strings that are 500
characters long.
So I tried this:
char *m_IDs[500]=(char *)malloc(m_Numb erOfStrings);

That obviously doesn't work, but I can't remember how to do it.

Thanks in advance,

SSJBardock

[Rolf Magnus]

Re: allocation problem

SSJBardock wrote:
[color=blue]
> please help me, I'm rewriting a program I made before because I lost
> the source and I want to allocate a number of text strings that are
> 500 characters long.
> So I tried this:
> char *m_IDs[500]=(char *)malloc(m_Numb erOfStrings);
>
> That obviously doesn't work, but I can't remember how to do it.[/color]

std::vector<std ::string> m_IDs(m_NumerOf Strings, std::string(500 ), ' ');

This creates a vector and initializes it with m_NumberOfStrin gs strings,
which are each initialized to 500 space characters.

If you insist on making your life hard by using arrays and pointers to
char:

char** m_IDs = new char*[m_NumberOfStrin gs];
for (int i = 0; i < m_NumberOfStrin gs; ++i)
m_IDs[i] = new char[500];

Note that those char arrays are uninitialized.

Don't forget to delete them:

for (int i = 0; i < m_NumberOfStrin gs; ++i)
delete [] m_IDs[i];
delete [] m_IDs;

[Rolf Magnus]

Re: allocation problem

Rolf Magnus wrote:
[color=blue]
> std::vector<std ::string> m_IDs(m_NumerOf Strings, std::string(500 ),
> ' ');[/color]

Of course that must be:

std::vector<std ::string> m_IDs(m_NumerOf Strings, std::string(500 , ' '));