main.rs

extern crate libc;
use libc::malloc;
use std::ptr;

struct Vecr<T> {
    ptr: *mut T,
    len: isize,
    capacity: isize
}

impl <T> Vecr<T> {
    fn new() -> Vecr<T> {
        Vecr {
            ptr: unsafe { libc::malloc(std::mem::size_of::<T>()) as *mut T },
            len: 0,
            capacity: 5
        }
    }
    fn idx(&self, i: isize) -> &T {
        unsafe { &*self.ptr.offset(i) }
    }
    fn push(&mut self, val: T) {
        unsafe { ptr::write(self.ptr.offset(self.len), val) }
        self.len+=1;
    }
        

        
}

fn main() {
    let mut vecr = Vecr::new();
    vecr.push(5);
    vecr.push(10);
    vecr.push(15);
    println!("{}", vecr.idx(0));
}