Class my_Path (C++linux)

#include <iostream>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <limits.h>

using namespace std;

class my_Path
{
    private:
     char *symbolic_ln;
     char my_buffer[PATH_MAX];
     char *last_symbol;
     char symbol;
     size_t size;
    public:
     my_Path();
     size_t size_Path();
     void write_Path();
};
my_Path::my_Path()
{
   
    symbolic_ln="/proc/self/exe";
    size=sizeof(my_buffer);
    symbol='\0';
}
size_t my_Path::size_Path()
{
    if(readlink(symbolic_ln,my_buffer,size)<=0)
     return -1;
    last_symbol=strrchr(my_buffer,'/');
    if(last_symbol==NULL)
     return -1;
    last_symbol++;
    *last_symbol=symbol;
    return (size_t) (last_symbol-my_buffer);
   
}
void my_Path::write_Path()
{
    size_Path();
    cout<<"Application path: "<<my_buffer<<endl;
}

int main(int argc, char **argv)
{
    my_Path now_Path;
    now_Path.size_Path();
    now_Path.write_Path();
    return 0;
}