turning variables into strings

how can I turn a numeric variable (es. :INT number) into a string variable (char string)? I need to to this in order to find out how long that string is , with the strlen() function. It's a data formatting trouble with a console program that I am porting from qbasic-dos to linux as my first C++ exercise.
thanks

*mercy for the newbie* :-P

Code:

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char buff[30];
sprintf( buff, "%d", myint );
int nchars = strlen( buff );

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Like this?

Welcome to the board jagerhans!

in c++ there is also stringstreams....

Code:

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#include<iostream>
#include<sstream>
using namespace std;
int main()
{
ostringstream out;
char str1[]={"I have "};
char str2[]={" apples"};
int apples=10;
out<<str1<<apples<<str2;
cout<<"The string in out is :- "<<out.str();
return 0;
}

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The slightly more obscure way of calculating the length of an integer is
len = log10(x) + 1;