C++ Simple Fighter Game Help

[Fireking300]

#include <iostream>
#include <time.h>
#include <cstdlib>
using namespace std;

void collision();
void endmatch();
void playerwin();
int damage(int health, int taken);

int health = 100;

void main()
{
		
}

void collision()
{
	
}

void endmatch()
{
	
}

int damage(int health, int taken)
{
	health = health - taken;
	return health;
}

I don't know how to do Classes yet. So Could anyone help me? I want to define opponent and player. Like opponent.health and player.health.
This is just going to be the backend of the game it will be a 2d game eventually.
So any additional help would be appreciated with +Rep x2

[Molleren]

This is a part from my own little game in C++ using SDL.

class Player
{
    private:
    //animations
    int frame;
    int dir;

    //X and Y offset of player
    int x, y;

    //Velocity
    int xVel, yVel;

    //Animation status
    int status;

    public:
    //Initiliaze
    Player();

    //STATS
    int statSpeed;
    int statHP;

    //Key presses
    void handle_input();

    //Move player
    void move(Tile *tiles[]);

    //Jump
    void jump();

    //Show player
    void show();

    //scrolling map
    void set_camera();
};

And all the initializing for every void etc.

//PLAYER VARIABLES//
Player::Player()
{
    //Initilaze offsets
    x = SCREEN_WIDTH / 2; //CENTER
    y = GROUNDY; //ON GROUND

    //Initialize velocity
    xVel = 0;
    yVel = 0;

    //Animation status
    frame = 0;
    status = PLR_LEFT;

    //STATS
    statSpeed = 32;
    statHP = 100;
}

void Player::handle_input()
{
    //If key was pressed
    if (event.type == SDL_KEYDOWN)
    {
        //adjust velocity
        switch (event.key.keysym.sym)
        {
            case SDLK_UP: yVel -= statSpeed; break; //PLR_HEIGHT / 2; break;
            case SDLK_DOWN: yVel += statSpeed; break; //PLR_HEIGHT / 2; break;
            case SDLK_LEFT: 
                xVel -= statSpeed; break;
                //dir = PLR_LEFT; break; //PLR_WIDTH / 2; break;
            case SDLK_RIGHT: 
                xVel += statSpeed; break;
                //dir = PLR_RIGHT; break;//PLR_WIDTH / 2; break;
        }
    }
    //If key released
    else if (event.type == SDL_KEYUP)
    {
        //adjust velocity
        switch (event.key.keysym.sym)
        {
            case SDLK_UP: yVel += statSpeed; break;//PLR_HEIGHT / 2; break;
            case SDLK_DOWN: yVel -= statSpeed; break;//PLR_HEIGHT / 2; break;
            case SDLK_LEFT: xVel += statSpeed; break;
                    //dir = PLR_LEFT; break;//PLR_WIDTH / 2; break;
            case SDLK_RIGHT: xVel -= statSpeed; break;
                    //dir = PLR_RIGHT; break;//PLR_WIDTH / 2; break;
        }
    }
}

void Player::move()
{
    //move left or right
    x += xVel;

    //If dot is too far to the left or right
    if ( (x < 0) || (x + PLR_WIDTH > SCREEN_WIDTH) )
    {
        //move back
        x -= xVel;
    }

    //Move up or down
    y += yVel;

    //if player is too far up or down
    if ( (y < 0) || (y + PLR_HEIGHT > SCREEN_HEIGHT) )
    {
        //move back
        y -= yVel;
    }
    
    /*if (y < GROUNDY)
    {
        yVel += 1;
        jumping = true;
    }
    else
    {
        yVel = 0;
        y = GROUNDY;
        jumping = false;
        jumpCount = 2;
    }
    y += yVel;*/

        //if player is too far up or down
    if ( (y < 0) || (y + PLR_HEIGHT >= SCREEN_HEIGHT) )
    {
        //move back
        y -= yVel;
    }
}

void Player::show()
{

    //Moving left
    if (xVel < 0)
    {
        status = PLR_LEFT;
        frame++;
    }
    else if (xVel > 0) //Moving right
    {
        status = PLR_RIGHT;
        frame++;
    }
    else if (yVel < 0) //moving up
    {
        status = PLR_UP;
        frame++;
    }
    else if (yVel > 0) //moving down
    {
        status = PLR_DOWN;
        frame++;
    }
    
    //ANIMATION
    if (frame >= 3)
    {
        frame = 0;
    }

    if (status == PLR_RIGHT)
    {
        apply_surface(x,  y, playerSprite, screen, &clipsRight[frame]);
    }
    else if (status == PLR_LEFT)
    {
        apply_surface(x, y, playerSprite, screen, &clipsLeft[frame]);
    }
    else if (status == PLR_UP)
    {
        apply_surface(x, y, playerSprite, screen, &clipsUp[frame]);
    }
    else if (status == PLR_DOWN)
    {
        apply_surface(x, y, playerSprite, screen, &clipsDown[frame]);
    }
}

[Pragma]

I really would suggest learning the basics of C++ before trying this. cprogramming.com is not bad, they have lots of beginner tutorials including one for classes. They even go into the more advanced like 3D rendering.