String declaration problems c++ - c++

Question

I was trying to compile this simple program but whenever I try to compile it it gives me many errors and all are string related errors like "syntax error:identifier 'string' " and "undeclared identifier" for my string function and variable.
I tried to delete using namespace std; and using std::string instead but still the same errors occur.
I am using Visual Studio 2017.
#include "Animal.h"
#include <iostream>
#include <string>
using namespace std;
int main() {
Animal Cat;
cin.get();
}
and thats the Animal.h:
class Animal
{
public:
Animal();
void SetAnimalName(string x);
string GetName();
void SetAnimalAge(int y);
int GetAnimalAge();
private:
string AnimalName;
int AnimalAge;
};
Animal.cpp
#include "Animal.h"
#include <iostream>
#include <string>
using namespace std;
Animal::Animal()
{
AnimalName = "cat";
AnimalAge = 3;
std::cout << "the Animal is: " << AnimalName << std::endl << "its Age is: " << AnimalAge;
}
void Animal::SetAnimalName(string x) {
AnimalName = x;
}
string Animal::GetName() {
return AnimalName;
}
void Animal:: SetAnimalAge(int y) {
AnimalAge = y;
}
int Animal::GetAnimalAge() {
return AnimalAge;
}

Answer 1

You are missing the #include <string> in your Animal.h which breaks the compilation of your main.cpp.
You are also missing std::string in your Animal.h. As a general rule of thumb, don't use using namespace std and stick with prefixing standard library functions with the std namespace (std::string in your case).