Problem with reading in values for calculations
Hi everyone! I'm working on a code to read information from a text file, calculate averages, and names. My infile looks like this:
Johnson 85 83 77 91 76
Aniston 80 90 95 93 48
Cooper 78 81 11 90 73
Gupta 92 82 30 69 87
Blair 23 45 96 38 59
Clark 60 85 45 39 67
Kennedy 77 31 52 74 83
Bronson 93 94 89 77 97
Sunny 79 85 28 93 82
Smith 85 72 49 75 63
And my code looks like:
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#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
using namespace std;
void CalculateAverage(ifstream& inp, ofstream& outp, double& courseAvg);
char CalculateGrade(double courseAvg);
int main()
{
int counter;
string name;
double classAvg = 0;
char grade;
double courseAvg;
ifstream infile;
ofstream outfile;
cout << "The output file has been created successfully and is located \non the root directory,";
cout << " filename classGrades.txt.\n\n";
infile.open ("c:\\classStudents.txt");
outfile.open ("c:\\classGrades.txt");
outfile << fixed << showpoint << setprecision(1);
outfile << "Student Test1 Test2 Test3 Test4 Test5 Average Grade" <<endl;
for (counter = 1; counter <= 10; counter++)
{
infile >> name;
outfile << left << setw(11) << name;
CalculateAverage(infile, outfile, courseAvg);
grade = CalculateGrade(courseAvg);
outfile << setw(8) << courseAvg << setw(6) << grade <<endl;
}
classAvg = classAvg + courseAvg;
classAvg = classAvg / 10;
outfile << "\nClass Average = " << classAvg <<endl;
infile.close();
outfile.close();
return 0;
}
void CalculateAverage(ifstream& inp, ofstream& outp, double& courseAvg)
{
int score;
double sum = 0;
int count;
for (count=1; count <= 5; count++)
{
inp >> score;
outp << left << setw(6) << score;
sum = sum + score;
courseAvg = sum / 5;
}
}
char CalculateGrade(double courseAvg)
{
if (courseAvg >= 90)
return 'A';
else if (courseAvg >= 80)
return 'B';
else if (courseAvg >= 70)
return 'C';
else if (courseAvg >= 60)
return 'D';
else
return 'F';
}
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The problem is that the Course Average is reading the very last average, as shown here:
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Student Test1 Test2 Test3 Test4 Test5 Average Grade
Johnson 85 83 77 91 76 82.4 B
Aniston 80 90 95 93 48 81.2 B
Cooper 78 81 11 90 73 66.6 D
Gupta 92 82 30 69 87 72.0 C
Blair 23 45 96 38 59 52.2 F
Clark 60 85 45 39 67 59.2 F
Kennedy 77 31 52 74 83 63.4 D
Bronson 93 94 89 77 97 90.0 A
Sunny 79 85 28 93 82 73.4 C
Smith 85 72 49 75 63 68.8 D
Class Average = 6.9
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Do I need to declare another function somewhere?
Last edited on
No, You just have your loops mixed up a little.
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for (counter = 1; counter <= 10; counter++) {
infile >> name;
outfile << left << setw(11) << name;
CalculateAverage(infile, outfile, courseAvg);
grade = CalculateGrade(courseAvg);
outfile << setw(8) << courseAvg << setw(6) << grade <<endl;
}
classAvg = classAvg + courseAvg;
classAvg = classAvg / 10;
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Should be.
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for (counter = 1; counter <= 10; counter++) {
infile >> name;
outfile << left << setw(11) << name;
CalculateAverage(infile, outfile, courseAvg);
grade = CalculateGrade(courseAvg);
outfile << setw(8) << courseAvg << setw(6) << grade <<endl;
classAvg += courseAvg;
}
classAvg /= 10;
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Also, In your CalculateAverage Function
courseAvg = sum / 5;
Should go outside of the For Loop. There no point having it inside.
Last edited on
That worked, thank you very much! It is much appreciated.
No worries.
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