Little question about char convertion

[A2501]

Hello!
I've been using sprintf to convert a group of integers to a char sequence.
like this:
char st[];
int a=2,b=3;
sprintf(st,"%d and %d",a,b);
cout<<st;

it works good, but when trying to use char *st; instead of the array an error is thrown.
"Error while dumping state (probably corrupted stack)"
if sprintf receives a char * as first argument, shouldn't it work too?

[AlanGRutter]

Are you saying you replaced

char st[];

by

char *st;

You haven't allocated any memory for the variable - you need to do this in both cases. I think you are lucky in the first case.

Try

char st[25] = {0}; // allow plenty of room

or

char *st = new char[25];

or better yet use an STL string.

Regards
Alan

[A2501]

thanks for the info.
the error is gone when the initialization is used. in both cases