to How Determine the Length of a String...
A C string can be created from a binary data type by using the sprintf() function. By
including the standard C I/O library ("#include <stdio.h>" and defining a character
array of sufficient size for the string, the pen coordinates can be converted from
binary to ASCII.
#include <stdio.h>
char buffer[16];
...
sprintf(buffer, "%d", x);
The length of a C string can be determined empirically by checking the size of the
number. (ie, greater than 9999 = 5, greater than 999 = 4, etc.)
Or, you can "#include <string.h>" and call the function:
int strlen(const char *);
The strlen() function computes the number of bytes in the string to which the
parameter not points, including the terminating null byte. The strlen() function returns
the length of the C string; no return value is reserved to indicate an error.
The optional length specification parameter of the printf and sprintf functions can be
used (when enabled) to create a string of a specific length by including the size
between the "%" and the conversions specification.
sprintf(buffer, "%10d", x); // convert x to a string of 10 characters
NOTE: To enable the full functionality of the printf and sprintf functions, select your
CCS project, follow the drop-down menus to Library Function Assumptions (Project>Properties->C/C++ Build), and select full Level of printf support required (-printf_support).
i.e.