stuck on input file

[kaiken]

okay im making a math game program that simple and need to have a user input a name and then that name.txt is brought up and use variables from the text to add to their score. heres my code kinda long.

#include <iostream>
#include <cmath>
#include <cctype>
#include <string>
#include <ctime>
#include <cstdlib>
#include <stdio.h>
#include <time.h>
#include <iomanip>
#include <fstream>

using namespace std;

int main()
{
string FirstName;
srand ((unsigned)time(0));
char continu = ' ';

int numb;
int sum;
int ssum;
int mult;
int quo;
double score=0;
double correct=0;
double incorrect=0;
ifstream inFile;
ofstream outFile;



cout << "**********************" << endl;
cout << "*** THE MATH GAME ****"<< endl;
cout << "*** Welcome ****"<<endl;
cout << "*** created By ****"<< endl;
cout << "***Nickolas ALeman****" << endl;
cout << "**********************" << endl;
cout << "**********************" << endl;
cout << "y/Y to continue, any other char to exit" << endl;

cin >> continu;
cout << "Please enter your name" << endl;
cin >> FirstName;

//outFile.open(FirstName+".txt",ios::app); this is my attempt not workin
//inFile.open(FirstName+".txt");
//if (inFile == false)
//{
// score = 0;
// incorrect = 0 ;
// correct =0;
//}
//else
//{
// inFile.getline( score );
// inFile.getline( correct );
// inFile.getline( incorrect );
//}

while (continu == 'y' || continu =='Y' )
{

unsigned a =rand() % 10 +1;
unsigned b =rand() % 10 +1;
sum = a+b;
ssum = (a)-(b);
mult = a*b;
quo = (a*b)/b;
cout << setprecision(2);


cout << endl;

cout << "Welcome " << FirstName << endl;
cout << "********CHOOSE A PROBLEM*********" << endl;
cout << "*********************************" << endl;
cout << "*********************************" << endl;
cout << "******** *********" << endl;
cout << "******** 1. ADD *********" << endl;
cout << "******** 2. Subtract *********" << endl;
cout << "******** 3. Multiply *********" << endl;
cout << "******** 4. Divide *********" << endl;
cout << "******** 5. Stats *********" << endl;
cout << "******** 6. QUIT *********" << endl;
cout << "******** *********" << endl;
cout << "*********************************" << endl;
cout << "*********************************" << endl;
cin >> numb;
switch (numb)
{
case 1:
cout << a << "+" << b << "=?" << endl;
cin >> numb;
if (numb ==sum)
{
cout << "Correct!!!" << endl;
cout << fixed << showpoint;
score = score + .05;
correct = correct +1;
break;
}
else
{
cout << "Wrong." << endl;
cout << fixed << showpoint;
score = score - .03;
incorrect = incorrect +1;
break;
}
case 2:

cout << a << "-" << b << " =?" << endl;
cin >> numb;
if (numb ==ssum)
{
cout << "Correct!!!" << endl;
cout << fixed << showpoint;
score = score +.05;
correct = correct +1;
break;
}
else
{
cout << "Wrong" << endl;
cout << fixed << showpoint;
score = score -.03;
correct = correct +1;
break;
}
case 3:

cout << a << "*" << b << "=?" << endl;
cin >> numb;
if (numb == mult)
{
cout << "Correct!!" << endl;
cout << fixed << showpoint;
score = score + .05;
correct = correct +1;
break;
}
else
{
cout << "wrong" << endl;
cout << fixed << showpoint;
score = score - .03;
correct = correct +1;
break;
}
case 4:

cout << a*b << "/" << b << "=?" << endl;
cin >> numb;
if ( numb == quo)
{
cout << "Correct!!" << endl;
cout << fixed << showpoint;
score = score + .05;
correct = correct +1;
break;
}
else
{
cout << "wrong" << endl;
cout << fixed << showpoint;
score = score - .03;
correct = correct +1;
break;
}
case 5:
cout << fixed << showpoint;
cout << "**************************************" << endl;
cout << "**************************************" << endl;
cout << "******" << FirstName; cout << setw(28); cout << "*********" << endl;
cout << "******Total earnings ="<< score; cout <<setw(12); cout << "*********" << endl;
cout << "******Total correct = " << correct; cout <<setw(12); cout << "*********" << endl;
cout << "******Total Incorrect =" << incorrect; cout << setw(11); cout << "*********" << endl;
cout << "**************************************" << endl;
break;
case 6:
//outFile << score << endl;
//outFile << correct << endl;
//outFile << incorrect << endl;
//inFile. close();
//outFile.close();
return 0;


cout << "Welcome " << FirstName << endl;
cout << "********CHOOSE A PROBLEM*********" << endl;
cout << "*********************************" << endl;
cout << "*********************************" << endl;
cout << "******** *********" << endl;
cout << "******** 1. ADD *********" << endl;
cout << "******** 2. Subtract *********" << endl;
cout << "******** 3. Multiply *********" << endl;
cout << "******** 4. Divide *********" << endl;
cout << "******** 5. Stats *********" << endl;
cout << "******** 6. QUIT *********" << endl;
cout << "******** *********" << endl;
cout << "*********************************" << endl;
cout << "*********************************" << endl;
cin >>numb;

}
}
//outFile << score << endl;
//outFile << correct << endl;
//outFile << incorrect << endl;
//inFile. close();
//outFile.close();
return 0;
}

[LB]

Do you have a question?

[kaiken]

yes how would i make an input file function that pulls variables from the text file?

[LB]

It works the same way as with reading in from std::cin, there is even a tutorial on this site:
http://www.cplusplus.com/doc/tutorial/files/

[kaiken]

i know that part. what im stuck on is after i infile >> score;
my variable comes out to some crazy -9.89034 or something.

[LB]

Did the file open successfully?

[kaiken]

I can open successfully but when I put into a double its comes out with a huge number luke -9.258037 •e27 or something like that. For example when I open the txt file with the numbers just being .05. I open it I try to declare what came from the input as double and use it regularly in my code but the number are crazy and don't make sense

[LB]

kaiken wrote:

I can open successfully

How do you know?

[newbieg]

Edit: bad advice deleted, thanks LB

[LB]

@newbieg: on most operating systems, such as Windows, a file can be opened in read-only mode multiple times without issue. I don't know what you were thinking with your notepad example ;p

[kaiken]

i figured it out. i had a few things wrong in my code.