Error in visual studio when initialising w SDL - c++

Question

i am tryanig to do a SDL initialazion class but i get this error on a line thats not even in the file
C2440 : cannot convert from initialisers list to screen
what have i done wrong this is SDL types i have included SDL and it works fine so no error there the error seems to be in the constructor
#include "stdafx.h"
#include "Screen.h"
using namespace std;
Screen::Screen()
: m_window(NULL)
, m_renderer(NULL)
, m_texture(NULL)
, m_buffer(NULL)
{
}
bool Screen::Init()
{
if ((SDL_INIT_VIDEO) < 0) {
return 1;
}
m_window = SDL_CreateWindow("Particle Simulation", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_RESIZABLE);
if (m_window == NULL) {
SDL_Quit();
return 2;
}
m_renderer = SDL_CreateRenderer(m_window, -1, SDL_RENDERER_PRESENTVSYNC);
m_texture = SDL_CreateTexture(m_renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STATIC, SCREEN_WIDTH, SCREEN_HEIGHT);
if (m_renderer == NULL) {
SDL_DestroyWindow(m_window);
SDL_Quit();
return 3;
}
if (m_texture == NULL) {
SDL_DestroyRenderer(m_renderer);
SDL_DestroyWindow(m_window);
SDL_Quit();
return 4;
}
m_buffer = new Uint32[SCREEN_WIDTH * SCREEN_HEIGHT];
memset(m_buffer, 0, SCREEN_WIDTH * SCREEN_HEIGHT * sizeof(Uint32));
m_buffer[30000] = 0xFFFFFFFF;
for (int i = 0; i < SCREEN_WIDTH * SCREEN_HEIGHT; i++) {
m_buffer[i] = 0xFFFFFFFF;
}
SDL_UpdateTexture(m_texture, NULL, m_buffer, SCREEN_WIDTH * sizeof(Uint32));
SDL_RenderClear(m_renderer);
SDL_RenderCopy(m_renderer, m_texture, NULL, NULL);
SDL_RenderPresent(m_renderer);
return true;
}
bool Screen::processEvents()
{
return false;
}
void Screen::close()
{
delete[] m_buffer;
SDL_DestroyRenderer(m_renderer);
SDL_DestroyTexture(m_texture);
SDL_DestroyWindow(m_window);
SDL_Quit();
}