I'm using the Tasking evaluation C compiler, and I'm having some trouble trying to convert a number into a string using the sprintf() function. It keeps giving me memory space errors, and I don't understand how to correct it.

This is the code I'm trying to work with right now:

char numstr;
unsigned long num = 500;
sprintf( numstr, "%lu", num );

The desired result is to create a string that looks like "500" so I can print the data to the serial port as a string.

Can anybody point out what I'm doing wrong here? I'm getting pretty frustrated. Thanks in advance