IO stream

[oLgAa25]

I have the following question,
I am trying to read from a file and output to another file.
But I am not getting exactly the expected output.

Can anyone help please!
using namespace std;

void calculateAverage(double test1, double test2, double test3, double
test4, double test5, double& studentAverage);
int calculateGrade(double grade);

int main()
{

string studentName;
int numberOfStudents = 0;
double classAverage = 0;
double studentAverage = 0;
double totalAverage = 0; //To add the average of all student
averages
char grade;
double test1, test2, test3, test4, test5;

ifstream inFile; // input stream variable for the student file
ofstream outFile; // output stream variable

inFile.open("c:\\studentFile.txt");
outFile.open("c:\\Student_out.txt");

cout << setfill(' ') <<setiosflags(ios:: left) << setw(11) <<
"Student" << setw(10) << "Test1"
<< setw(8) << "Test2" << setw(8) << "Test3" << setw(8) << "Test4"
<< setw(8) << "Test5"
<< setw(8) << "Average" << setw(8) << "Grade" <<endl;

outFile << setfill(' ') <<setiosflags(ios:: left) << setw(11) <<
"Student" << setw(10) << "Test1"
<< setw(8) << "Test2" << setw(8) << "Test3" << setw(8) << "Test4"
<< setw(8) << "Test5"
<< setw(8) << "Average" << setw(8) << "Grade" << endl;
if (!inFile)
{
cout << "Unable to open the file." <<endl;
return 1;
}

while(inFile)
{
outFile.setf(ios::fixed, ios::floatfield);
outFile.setf(ios::showpoint);
outFile << setprecision(2);

inFile >> studentName >> test1 >> test2 >> test3 >> test4 >> test5
;

calculateAverage(test1, test2, test3, test4, test5,
studentAverage);

grade = calculateGrade(studentAverage);

cout << setfill(' ') << setiosflags(ios::left) << setw(11) <<
studentName << setw (10) << test1
<< setw(8) << test2 << setw(8) << test3 << setw(8) << test4
<< setw(8) << test5 << setw(9) << studentAverage << setw(8) <<
grade<<endl;
outFile << setfill(' ') << setiosflags(ios::left) << setw(11) <<
studentName << setw (10) << test1
<< setw(8) << test2 << setw(8) << test3 << setw(8) << test4
<< setw(8) << test5 << setw(9) << studentAverage << setw(8) <<
grade<<endl;

totalAverage = totalAverage + studentAverage;

numberOfStudents++;
classAverage = totalAverage / numberOfStudents;
}
outFile << endl << setprecision(2)<< "Class average is:" <<
classAverage << endl;

inFile.close();
outFile.close();

system("PAUSE");
return 0;
}

//function to calculate the average
void calculateAverage(double test1, double test2, double test3, double
test4, double test5, double& studentAverage)
{

studentAverage = static_cast<double>(test1 + test2 + test3 + test4
+ test5) / 5.0;

}


int calculateGrade(double studentAverage)
{
char grade;

if (studentAverage <= 100 && studentAverage >= 90)
grade = 'A';
else if (studentAverage < 90 && studentAverage >= 80)
grade = 'B';
else if (studentAverage < 80 && studentAverage >= 70)
grade = 'C';
else if (studentAverage < 70 && studentAverage >= 60)
grade = 'D';
else if (studentAverage < 60 && studentAverage >= 0)
grade = 'F';
else
cout << "Invalid grade " << endl;

return grade;

}

[oLgAa25]

Thank you so much,
but you still didn't recommend a good c++ book !..;-)

[Aleksander Beluga]

oLgAa25 wrote:

Thank you so much,
but you still didn't recommend a good c++ book !..;-)

I believe Bjarne Stroustrup's "The C++ Language" 3rd ed is the best.

[osmium]

Olga writes:

but you still didn't recommend a good c++ book !..;-)

I recommend authors, not books. Stephen Prata and Robert Lafore are both
very good. Based on what I have seen of your work, I would defer getting
Stroustrup for a while.

[BobR]

oLgAa25 wrote in message
<11**********************@i40g2000cwc.googlegroups .com>...

Thank you so much,
but you still didn't recommend a good c++ book !..;-)

While you are researching what books to get, go download 'Thinking in C++'
vol.1(of 2) at:
(available for free here):
http://www.mindview.net/Books/TICPP/...ngInCPP2e.html

It is NOT a 'programming newbie' book. It's not 'the' best book, but, it it
extremely far from the worst (..and won't cost you anything but short
download time. You can buy it in hardcopy too.)

I've heard good things about Mr. Glassborow's book 'You Can Do It!'
http://www.spellen.org/youcandoit
It is targeted for 'programming newbies'. I wish it had been available when I
started C++.

Besides what the other posters have suggested, you can find book reviews at
www.accu.org to aid in your choice(s).

--
Bob R
POVrookie

[oLgAa25]

Hello all,
one more question, what about Deitel & Deitel.? any ideas?
appreciate it

[oLgAa25]

Hello all,
one more question, what about Deitel & Deitel? any comments?
Thank you

[Neil Cerutti]

On 2006-03-02, oLgAa25 <ol********@yahoo.com> wrote:

Hello all,
one more question, what about Deitel & Deitel? any comments?
Thank you

Personally, I didn't like it. The programming style, the problems, and
the order in which they presented topics went against the
recommendations of Bjarne Stroustrup: Learn how to harness the power
of the standard library before mastering the low-level, C-compatible
features. _Accelerated C++_ (Koenig, Moo) uses the approach advocated
in _The C++ Programming Language_.

--
Neil Cerutti