In order to create a C++ file, you need a few things.
First, put all your #include statements at the top, outside of any classes or functions:
#include <iostream>
#include <string>
#include "pikachu.h"
using namespace stdSecond, put your class headers (if in the same file):
class Player {
private:
/* some variables */
public:
/* some functions */
};Third, put your function definitions:
int main(){
/* some code */
return 0;
}