错误：'s'未命名类型

代码给我的错误，我不知道为什么。它说错误发生在倒数第二行，或introStory函数的末尾。（我现在在括号中写这个，因为据说我的帖子主要是代码，我需要添加更多细节。

#include <iostream>
#include <string>
#include "windows.h"
using namespace std;
string classChooser();
string nameChooser();
void introStory(string position, string name);
int main()
{
    string charPosition = classChooser();
    cout << "You chose " << charPosition << " as your class.";
    string charName = nameChooser();
    introStory(charPosition,charName);
    return 0;
}
string classChooser()
{
    string position;
    while(true)
    {
        cout << "Choose a class wisely... nn";
        cout << "tWarrior: nt  Health:75nt  Attack:25nn";
        cout << "tWizard: nt  Health:25nt  Attack:75nn";
        cout << "tRogue: nt  Health:50nt  Attack:50n";
        cout << "nWhich class do you want to select? : ";
        cin >> position;
        if(position == "wizard" ||position ==  "warrior" ||position ==  "rogue" ||position ==  "Wizard" ||position ==  "Warrior" ||position ==  "Rogue")
        {
            system("cls");
            return position;
        }
        else
        {
            cout << "nnMake sure you typed in the word correctly, and used appropriate capitalization.";
            Sleep(3200);
            system("cls");
            continue;
        }
    }
}
string nameChooser()
{
    string name;
    cout << "nPlease choose a name for your hero: ";
    cin >> name;
    cout << "nYour name is now " << name;
    return name;
}
void introStory(string position, string name)
{
    cout << "nLet the story begin...";
    Sleep(2100);
    system("cls");
    cout << "Once upon a time in a poor village, a young kid named " << name << " was digging a hole.";
    Sleep(4000);
    cout << "After digging for a couple hours he came across a chest.";
    Sleep(3200);
    string weapon;
    if(position == "Warrior" || position == "warrior")
        weapon = "sword";
    else if(position == "Wizard" || position == "wizard")
        weapon = "wand";
    else
        weapon = "dagger";
    cout << "When he opened it, he found a " << weapon;
    Sleep(2000);
    cout << "That was exactly what he had been wanting for the past couple of months.";
    Sleep(3000);
    cout << "You see, " << name << " wanted to be a " << position;
    Sleep(2700);
    cout << "So a " << weapon << " was the perfect choice.";
    Sleep(2100);
    cout << "With his new " << weapon << " he could finally explore the dark cave his father was lossed in.";
    Sleep(4000);
    cout << "He could slay the monsters in there everyone was so terrified of.";
    Sleep(3200);
    cout << "He headed toward the cave.";
    Sleep(2000);
}