please see the attached lab5.zip files and the readme has the directions

ptrmath.c
#include
#include
#include
#define FILENAME "data.bin"
#define MAX_SIZE 80
char* readptr(void *ptr) {
return (char *)ptr;
}
/* Decode the data provided in databuf into the array data.
*
* The format of the data in databuf is as described in the README. You
* may assume that the data is well-formed, and need not perform any
* error checking.
*/
void decode_buffer(void *databuf, char *data) {
    
    char* tempdatabuf = databuf;
    int size = *(size_t...