Cannot Include Iostream

Hello,
When I try to include iostream in my Hero.h header, I get a series of errors, including not finding the directive and some UCLASS() errors.
Hero.h
// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include <iosteam>

#include "GameFramework/Pawn.h"
#include "Hero.generated.h"

UCLASS()
class MOBA_API AHero : public APawn
{
	GENERATED_BODY()

public:
	// Sets default values for this pawn's properties
	AHero();

	// Called when the game starts or when spawned
	virtual void BeginPlay() override;
	
	// Called every frame
	virtual void Tick( float DeltaSeconds ) override;

	// Called to bind functionality to input
	virtual void SetupPlayerInputComponent(class UInputComponent* InputComponent) override;
	
private:
	float _health;
	float _mana;

	bool _alive;

	std::vector<FVector> _waypoints;
};

also, everything runs extremely slowly, and I have to wait 15 seconds before i see any errors…

Is this a copy+paste of your code? Your
#include iostream is missing the R.

Also, you’ll need to #include vector to use std::vector, though really you should use TArray, which is UE4’s dynamic array.

Apparently I can’t include angle brackets in these posts, make sure the iostream and vector includes have them.