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Struct/File Problem? Need help!

ProgramminNewby (11)
Okay, so the program I'm working on is too rewrite a program I've already done. The prompt of the first program is:
"Write a program which allows a user to pick a planet and then see the following information on the chosen planet. The user can see as many planets as they want one at a time. All the planet info MUST be hardwired into the program, use structs and have a minimum of two programmer build functions. Planet information needed for each:
Distance of from the sun, period of revolution, rotation period, equatorial diameter, satellite number, and ring number.

I have already built this code:
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//Library Section
#include <conio.h>
#include <iostream>
#include <iomanip>
#include <string>
#include <ExtraLibrary.h>
#include <vector>
#include <cstdlib>
#include <apmatrix.h>
using namespace std;

//struct section
struct Planet
{	//All measurements are in kilometers!
	string Name;
	double Distance;
	double PoR;
	double Rotation;
	long Diameter;
	int SN;
	int Rings;
};
	

//global var section
char Ans;
int I;
vector<Planet>Planets(9);

//prototype section
void display(int&);
void ask(int&);
void Planetdata(vector<Planet>&);

//main section
void main()
{

	do{
		system("cls");

		Planetdata(Planets);
		ask(I);
		system("cls");
		display(I);
		

		cout<<endl<<endl<<endl;

		cout<<"Would you like to run the program again (Y/N)?"<<endl;
		cin>>Ans;

	}while(Ans=='y'||Ans=='Y');
}

void Planetdata(vector<Planet>&)
{
	Planets[0].Name="Mercury";
	Planets[0].Distance=57.9;
	Planets[0].PoR=.241;
	Planets[0].Rotation=59;
	Planets[0].Diameter=4880;
	Planets[0].SN=0;
	Planets[0].Rings=0;

	Planets[1].Name="Venus";
	Planets[1].Distance=108.2;
	Planets[1].Rotation=.61;
	Planets[1].PoR=243;
	Planets[1].Diameter=12100;
	Planets[1].SN=0;
	Planets[1].Rings=0;

	Planets[2].Name="Earth";
	Planets[2].Distance=149.6;
	Planets[2].PoR=1;
	Planets[2].Rotation=.99;
	Planets[2].Diameter=12756;
	Planets[2].SN=1;
	Planets[2].Rings=0;

	Planets[3].Name="Mars";
	Planets[3].Distance=227.9;
	Planets[3].PoR=1.88;
	Planets[3].Rotation=1.03;
	Planets[3].Diameter=4880;
	Planets[3].SN=2;
	Planets[3].Rings=0;

	Planets[4].Name="Jupiter";
	Planets[4].Distance=778.3;
	Planets[4].PoR=11.86;
	Planets[4].Rotation=.41;
	Planets[4].Diameter=142800;
	Planets[4].SN=16;
	Planets[4].Rings=1;

	Planets[5].Name="Saturn";
	Planets[5].Distance=1427;
	Planets[5].PoR=29.46;
	Planets[5].Rotation=.44;
	Planets[5].Diameter=120660;
	Planets[5].SN=18;
	Planets[5].Rings=1000;

	Planets[6].Name="Uranus";
	Planets[6].Distance=287;
	Planets[6].PoR=84;
	Planets[6].Rotation=.7;
	Planets[6].SN=15;
	Planets[6].Rings=11;

	Planets[7].Name="Neptune";
	Planets[7].Distance=4497;
	Planets[7].PoR=165;
	Planets[7].Rotation=.67;
	Planets[7].Diameter=49528;
	Planets[7].SN=8;
	Planets[7].Rings=4;

	Planets[8].Name="Pluto";
	Planets[8].Distance=5900;
	Planets[8].PoR=248;
	Planets[8].Rotation=6.4;
	Planets[8].Diameter=2290;
	Planets[8].SN=1;
	Planets[8].Rings=0;

}

void ask(int&I)
{
	do{
			cout <<"Please select a number - enter the number leading to the corresponding planet:"<<endl<<endl;
			cout <<"1 - Mercury"<<endl;
			cout <<"2 - Venus"<<endl;
			cout <<"3 - Earth"<<endl;
			cout <<"4 - Mars"<<endl;
			cout <<"5 - Jupiter"<<endl;
			cout <<"6 - Saturn"<<endl;
			cout <<"7 - Uranus"<<endl;
			cout <<"8 - Neptune"<<endl;
			cout <<"9 - Pluto"<<endl;
			cin>>I;

			if(I<1||I>9)
				{
					cout<<"Invalid number, please try again."<<endl;
					getch();
				}

			system("cls");
	    }while(I<1||I>9);
		I--;
}

void display(int&I)
{
		cout<<"Planet Name:"<<endl;
			gotoxy(54,0);
			cout<<Planets[I].Name;
			gotoxy(0,1);
		cout<<"Distance from the Sun (in millions of kilometers):"<< endl;
			gotoxy(54,1);
			cout << Planets[I].Distance;
			gotoxy(0,2);
		cout<<"Revolution (in Earth years): "<<endl;
			gotoxy(54,2);
			cout << Planets[I].PoR;
			gotoxy(0,3);
		cout << "Rotation (in Earth days): "<<endl;
			gotoxy(54,3);
			cout << Planets[I].Rotation;
			gotoxy(0,4);
		cout<<"Equatorial Diameter (kilometers): "<<endl;
			gotoxy(54,4);
			cout << Planets[I].Diameter;
			gotoxy(0,5);
		cout<<"Satellites: "<<endl;
			gotoxy(54,5);
			cout << Planets[I].SN;
			gotoxy(0,6);
		cout<<"Rings: "<<endl;
			gotoxy(54,6);
			cout << Planets[I].Rings;
}



My new assignment is to "rewrite this problem so that all the data is read in from a file called Planets.Dat and place them to the screen. For this program you do know there are 9 sets of data to be read in." This is what I have so far:

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//Library Section
#include <conio.h>
#include <iostream>
#include <iomanip>
#include <string>
#include <ExtraLibrary.h>
#include <vector>
#include <cstdlib>
#include <fstream>
#include <apmatrix.h>
using namespace std;

//struct section
struct Planet
{	//All measurements are in kilometers!
	string Name;
	double Distance;
	double PoR;
	double Rotation;
	long Diameter;
	int SN;
	int Rings;
};
//global var section
char Ans;
int I;
vector<Planet>Planets(9);
int Choose;
ifstream in_file;
ofstream out_file;

//prototype section
void display(int&);
void ask(int&);
void Planetdata(vector<Planet>&, ofstream&);

void main()
{
	do{
		system("cls");

		Planetdata(Planets, I);

		ask(Choose);

		system("cls");

		display(Choose);

		cout<<"Run program again? (Y/N)"<<endl;
		cin>>Ans;
	   }while(Ans=='y'||Ans=='Y');
}

void Planetdata(vector<Planet>&Planets, int&I)
{
	for(I=0;I<9;I++)
		in_file>>Planets[I];
}

void ask(int&Choose, ifstream&in_file)
{
	do{
			cout <<"Please select a number - enter the number leading to the corresponding planet:"<<endl<<endl;
			cout <<"1 - Mercury"<<endl;
			cout <<"2 - Venus"<<endl;
			cout <<"3 - Earth"<<endl;
			cout <<"4 - Mars"<<endl;
			cout <<"5 - Jupiter"<<endl;
			cout <<"6 - Saturn"<<endl;
			cout <<"7 - Uranus"<<endl;
			cout <<"8 - Neptune"<<endl;
			cout <<"9 - Pluto"<<endl;
			cin>>Choose;
			if(Choose<1||Choose>9)
				cout<<"Not a valid planet choice, please try again. Press any key to try again.";
				getch();
				system("cls");
	}while(Choose<1||Choose>9);
	Choose--;
}

void display(int&Choose)
{

		cout<<"Planet Name:"<<endl;
			gotoxy(54,0);
			cout<<Planets[Choose].Name;
			gotoxy(0,1);
		cout<<"Distance from the Sun (in millions of kilometers):"<< endl;
			gotoxy(54,1);
			cout<<Planets[Choose].Distance;
			gotoxy(0,2);
		cout<<"Revolution (in Earth years): "<<endl;
			gotoxy(54,2);
			cout<<Planets[Choose].PoR;
			gotoxy(0,3);
		cout<<"Rotation (in Earth days): "<<endl;
			gotoxy(54,3);
			cout<<Planets[Choose].Rotation;
			gotoxy(0,4);
		cout<<"Equatorial Diameter (kilometers): "<<endl;
			gotoxy(54,4);
			cout<<Planets[Choose].Diameter;
			gotoxy(0,5);
		cout<<"Satellites: "<<endl;
			gotoxy(54,5);
			cout<<Planets[Choose].SN;
			gotoxy(0,6);
		cout<<"Rings: "<<endl;
			gotoxy(54,6);
			cout<<Planets[Choose].Rings;
}


This doesn't work, and I can't find where I went wrong!
clanmjc (666)
in_file>>Planets[I]; You don't have a stream operator to do this. You will need to overload the operator.
ProgramminNewby (11)
Thank you! I figured it out :)
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