C++ Can anyone look over my complete newbie text based rpg game code?

I am a complete brand new coder who has had probably less than 2 weeks with c++ and taught myself a lot of if statements as well as switches.

It would be great if someone could look through this game I've been making and talk me through all the things I should and shouldn't be doing.

Note that the second trail if statement is not coded yet.

#include "MeadowGiant.h"
#include <iostream>
#include <string>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>

MeadowGiant::MeadowGiant()
{
int trail, caveEnter;
int fight1;
int loot;
int goblinAttack, goblinHP, HP, attack, action1, ability; 
goblinAttack = 5;
goblinHP = 10;
HP = 100;

std::cout << -Insert story narrative- Choose a trail to go down.\n";
std::cin  >> trail; 

    if(trail==1)
    {
    std::cout << "-Insert story narrative- Come across a cave. Do you go in?\n";
    std::cin  >> caveEnter;

        if(caveEnter==1)
        {
        std::cout << "You are ambushed by a goblin. Run or fight?\n";
        std::cin >> fight1;

        goblinFight:
        loot = rand() % 4 + 1;
        srand(time(NULL));           

        if(fight1==1)
        {
        std::cout   << "Your HP: " << HP << std::endl;
        std::cout   << "Enemy HP: " << goblinHP << std::endl;
        std::cout   << "What do you do?\n
                    << "[1] Attack [2] Run \n";
        std::cin    >> action1;
        }
            if(goblinHP<=0)
            {
            std::cout << "You have slain the goblin!\n" 
                      << "You head towards the chest and take the spoils\n"
                      << "of battle!\n";
                 switch(loot)
            {
            case 1: std::cout << "You find a bastard sword!\n"
                              attack = attack + 7;
                              goto exitCave;
            case 2: std::cout << "You find an Enchanted Staff!\n"
                              attack = attack + 10;
                              goto exitCave;
            case 3: std::cout << "You find an Obsidian Dagger!\n"
                              attack = attack + 9;
                              goto exitCave;
            case 4: std::cout << "You find a Holy Mace!\n"
                              attack = attack + 10;
                              goto exitCave;
            }
    else if(action1==1)
    {
    std::cout   << "You successfully hit the goblin!\n"
                << "He strikes back!\n";
    attack = rand() % 10 + 1;  
    srand(time(NULL));

    goblinHP = goblinHP - attack;
    HP = HP - goblinAttack;
    goto goblinFight;
    }
    else if(action==2)
    {
    std::cout   << "You take the cowards way out and leave the cave.\n";
    goto exitCave;
    }
    }
else if(caveEnter==2)
{
exitCave:
std::cout << "You have exited the cave.\n";
} 
else
{
goto exitCave;
}
}
}