All your header files are "C" files that you shouldn't use. You need to figure out which parts of the standard library you want to use, and include the correct header files.
The closest to what you have in your post would be:
1 2 3 4 5 6
#include <cstdio> // instead of <stdio.h>
#include <cstdlib> // instead of <stdlib.h>
// #include <conio.h> -- do not use
#include <mil.h> // don't know what this is
#include <cstring> // instead of <string.h>
usingnamespace std;
Note 1: If you just want to print some output, you should learn how to use <iostream> instead of <cstdio>.
Note 2: If you are including <string.h> because you want the std::string class, you should change it to <string>, not <cstring>.