When I am trying to launch the windows debugger in visual studio 13 in my "Hello World" output, I already am receiving build errors

I have copied exactly what the person instructing me has and I am not seeing a console open up with that output for C++. I am getting these errors:

Warning 1 warning C4627: '#include ': skipped when looking for precompiled header use c:\users\tony\documents\visual studio 2013\projects\consoleapplication7\consoleapplication7\consoleapplication7.cpp 2 1 ConsoleApplication7

Error 2 error C1010: unexpected end of file while looking for precompiled header. Did you forget to add '#include "stdafx.h"' to your source? c:\users\tony\documents\visual studio 2013\projects\consoleapplication7\consoleapplication7\consoleapplication7.cpp 9 1 ConsoleApplication7

This is my code:

#include <iostream>

int main()
{
    std::cout << "Hello World!/n"; //this will output hello world
    
}