Code: Select all
/**
/**
Marcel Girgis
11/24/10
1:57pm
PROGRAM ASSIGNMENT 3
Problem:
Write a program to
- Store test grades for all students in a CS class
- Store data in a 2d array
- 50 rows by 5 columns
Input Formatting:
<# telling how many students>
<grade1><space><grade2><space><grade3><space><grade4><space><grade 5>
Output:
Via console
Additional Notes:
- Adjust constants and recompile to change settings
**/
#include <fstream>
#include <iostream>
#include <iomanip>
#include <string>
const unsigned short int MAX_STUDENT_SIZE=50, PADDING_WIDTH=8;
using namespace std;
void InitializeArray (int sudentRecords[][5]);
int ReadStudentData (string file_name, int sudentRecords[][5]);
void ShowStudentRecords(int sudentRecords [][5], int num);
void ShowResults(int sudentRecords [][5], int num);
int main() {
int sudentRecords[MAX_STUDENT_SIZE][5];
int student_counter=0;
InitializeArray(sudentRecords);
//Prompt for file names
string file_name;
cout << "Enter the file name you would like to read data from: ";
cin>>file_name;
//read student data and fetch # read
student_counter = ReadStudentData(file_name, sudentRecords);
if(student_counter==-1) return -1; //signifies no students to be read, so exit.
//echo records
ShowStudentRecords(sudentRecords, student_counter);
//do all requested processing and output
cout << "\nProcessing data...\n"<<endl;
ShowResults(sudentRecords, student_counter);
cout << "\nProgram terminating. \n\nSo long, and thanks for the fish! =)"
<<endl;
system("pause");
}
/*
Simply initializes our all student data to default values.
This function is part of the program requirements.
Pre:Takes a 2d array of size MAX_STUDENT_SIZE x 5
Post: Array values have been set to zero
*/
void InitializeArray(int studetRecords[][5]) {
for(int i=0;i<MAX_STUDENT_SIZE;i++) {
for(int j=0;j<5;j++) {
studetRecords[i][j]=0;
}
}
}
/*
This function uses fstream to read from a file with argument 1's name
and populate our student's data based on the results.
pre: constant MAX_STUDENT_SIZE has been properly set
post: array student records now contain all student records.
*/
int ReadStudentData(string file_name, int studentRecords[][5]) {
fstream file_in;
int student_counter=0;
//double total_salary=0;
file_in.open(file_name.data());
if(!file_in) {
cout << "There was an error opening your file!"<<endl;
return -1; //to signify an error
}
cout << "Successfully opened file."<<endl;
//parse file
while(!file_in.eof()) {
//read amount first
file_in>>student_counter;
for(int i=0;i<student_counter&&i<MAX_STUDENT_SIZE;i++) {
for(int j=0;j<5;j++) {
file_in>>studentRecords[i][j];
file_in.ignore();
//file_in.put('\n');
if(!file_in)return -1; //there aren't as many available
//grades as there should be.
}
}
//ignore the extra newline read after the ID
file_in.ignore();
}
cout << "\nSuccessfully read " << student_counter <<
" students."<<endl;
file_in.close();
return student_counter;
}
//pre: sudent records row size > num
//post: displays all requested results
void ShowResults(int sudentRecords [][5], int num) {
cout << setw(PADDING_WIDTH)<<"STUDENT #"
<< setw(PADDING_WIDTH)<<"Average"
<< setw(PADDING_WIDTH)<<"Grade\n";
double average;
int averageCounter[5]={0,0,0,0,0}; //index 1 corresponds to A, 2 corresponds to B, etc;
double highestAverage=0;
int highestAverageIndex=-1;
for(int i=0;i<num;i++) {
average=0;
cout << endl;
cout << setw(PADDING_WIDTH)<< i;
//count each grade for the current student (j)
for(int j=0;j<5;j++) {
average+=sudentRecords[i][j];
}
average/=5; //5 grades
//check if we have a new high average
if(average > highestAverage) {
highestAverage=average;
highestAverageIndex=i;
}
cout << setw(PADDING_WIDTH)<<fixed << setprecision(1)<< average;
//determine where they fall in average
char letter = ((average >= 90 && average<= 100 ) ? 'A' :
( average >= 80 && average< 90 ) ? 'B' :
( average >= 70 && average< 80 ) ? 'C' :
( average >= 60 && average< 70 ) ? 'D' :
( average < 60 ) ? 'F' : 'X') ;
cout << setw(PADDING_WIDTH)<< letter;
//increment out counter
averageCounter[letter-(letter !='F' ? 'A' : 'B' )]++;
}
//display averages
for(int i =0;i<5;i++)
cout << endl << "Number of " << char( (i==4? 5 : i)+'A')<<"'s: " << averageCounter[i];
cout << endl << "Highest Average: Student # : " << highestAverageIndex << ", " << highestAverage;
}
//pre: array studentRecords contains grades for rows j to num
//post: displays to console the contents of student records
void ShowStudentRecords(int sudentRecords [][5], int num) {
cout << setw(PADDING_WIDTH)<<"STUDENT #"
<< setw(PADDING_WIDTH)<<"TEST1"
<< setw(PADDING_WIDTH)<<"TEST2"
<< setw(PADDING_WIDTH)<<"TEST3"
<< setw(PADDING_WIDTH)<<"TEST4"
<< setw(PADDING_WIDTH)<<"TEST5\n";
for(int i=0;i<num;i++) {
cout << endl;
cout << setw(PADDING_WIDTH)<< i;
for(int j=0;j<5;j++) {
// cout << setw(PADDING_WIDTH)<< i;
cout << setw(PADDING_WIDTH)<<sudentRecords[i][j];
}
}
}
You should get a +1 for every ternary you use!
I am also a naive fool for assuming that including an abundance of the code that Arce's professor is specifically against, is clearly insulting their judgment. It is apparent that Arce's professor is dimwitted for enforcing that her students produce clean, readable and maintainable code. Especially in a seemingly basic programming course, where the prerequisites would surely be a knowledge of the bare essentials of the language. Of course, I do not know the situation that Arce is in, so this is merely speculation...seems stressful, though. 
