Need your inputs please

Beginner2016 (21)

Hello!

I am struggling to figure out why this solution is giving me LNK1120 and LNK2019 error message when I am trying to build the solution but there's no error message on my compile. Please help

Design and develop a C++ program for reporting grades for a class. Your program should
read in an input file of student grades records, and it should produce an output file of
student grades records plus a report (output to monitor) of grade distributions. Your
program would read in the records from the file one record at a time (sequentially) and
output one record at a time to the output file, it update an array of grades. After building
the array of grades, then it processes the array to print the grade distributions histogram.
The program will also build array each student score in the class and then sort it (use
bubble sort) then out put the LOWEST SCORE IN CLASS, HIGHEST SCORE IN
CLASS, and NUMBER OF STUDENTS.

  #include "stdafx.h"
#include <iostream>
#include <string> 
#include <fstream>
#include <iomanip>
#include <cmath>

 
using namespace std;


struct StudentData
{
	string first_name;
	string last_name;
	int exam1;
	int exam2;
	int exam3;
	int total;
	char ch;
	
};

const int SIZE = 9;
const int INFO = 4;

// Function prototypes
void openInputFile(ifstream &, string);
void getTotal(StudentData[]);
void getGrade(StudentData[]);
void calcLowest(StudentData[], int &, int &, int &, int &, int[]);
void calcHighest(StudentData[], int &, int &, int &, int &, int[]);
void getAverage(StudentData[], int, double &, double &, double &, double &, double[]);
void getStd(StudentData[], double &, double &, double &, double &, double &, double &, double &, double &, double[]);
void print(StudentData[], int[], int[], double[], double[]);
void sort(StudentData[]);

int main()
{
	// Variables 
	StudentData arr[SIZE];
	int lowest1, lowest2, lowest3, lowest4;		// Stores lowest exam scores
	int highest1, highest2, highest3, highest4; // Holds highest exam scores
	double average1 = 0, average2 = 0, average3 = 0, average4 = 0; // Represents average of each exam 
	double std1 = 0, std2 = 0, std3 = 0, std4 = 0; // Holds standard deviation for Exams 1-3 and Total 
	int lowest[INFO] = {};
	int highest[INFO] = {};
	double average[INFO] = {};
	double standardDeviation[INFO] = {};

	ifstream inFile;
	string inFileName = "C:\\Users\\Christian\\Desktop\\ClassGrades.txt";

	// Call function to read data in file
	openInputFile(inFile, inFileName);

	// Read data into an array of structs 
	for (int count = 0; count < SIZE; count++)
	{
		inFile >> arr[count].first_name >> arr[count].last_name >> arr[count].exam1 >> arr[count].exam2 >> arr[count].exam3;
	}

	// Close input file
	inFile.close();

	// Get score total for each student 
	getTotal(arr);

	// Determine grade for each student
	getGrade(arr);

	// Calculate lowest scores in each exam and total scores
	calcLowest(arr, lowest1, lowest2, lowest3, lowest4, lowest);

	// Calculate highest scores in each exam and total scores  
	calcHighest(arr, highest1, highest2, highest3, highest4, highest);

	// Calculate average of each exam and the average of the total scores
	getAverage(arr, SIZE, average1, average2, average3, average4, average);

	// Calculate standard deviation of each category 
	getStd(arr, std1, std2, std3, std4, average1, average2, average3, average4, standardDeviation);
	cout << "\n";

	// Print unsorted data
	print(arr, lowest, highest, average, standardDeviation);
	cout << "\n";

	// Sort data 
	sort(arr);

	// Print sorted data
	print(arr, lowest, highest, average, standardDeviation);

	system("PAUSE");

	return 0;
}

/**
* Pre-condition:
* Post-condition:
*/
void openInputFile(ifstream &inFile, string inFileName)
{
	//Open the file
	inFile.open(inFileName);

	//Input validation
	if (!inFile)
	{
		cout << "Error to open file." << endl;
		cout << endl;
		return;
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void getTotal(StudentData arr[])
{
	for (int i = 0; i < SIZE; i++)
	{
		arr[i].total = arr[i].exam1 + arr[i].exam2 + arr[i].exam3;
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void getGrade(StudentData arr[])
{
	for (int i = 0; i < SIZE; i++)
	{
		if (arr[i].total >= 90)
			arr[i].ch = 'A';
		else if (arr[i].total >= 80)
			arr[i].ch = 'B';
		else if (arr[i].total >= 70)
			arr[i].ch = 'C';
		else if (arr[i].total >= 60)
			arr[i].ch = 'D';
		else
			arr[i].ch = 'F';
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void calcLowest(StudentData arr[], int &lowest1, int &lowest2, int &lowest3, int &lowest4, int lowest[])
{
	int smallest = 0;

	lowest1 = arr[0].exam1;
	lowest2 = arr[0].exam2;
	lowest3 = arr[0].exam3;
	lowest4 = arr[0].total;

	// Loop to determine lowest score from Exam1, 2, 3, and Total
	for (int i = 0; i < SIZE; i++)
	{
		if (lowest1 > arr[i].exam1)
		{
			lowest1 = arr[i].exam1;
			smallest = i;
		}

		if (lowest2 > arr[i].exam2)
		{
			lowest2 = arr[i].exam2;
			smallest = i;
		}

		if (lowest3 > arr[i].exam3)
		{
			lowest3 = arr[i].exam3;
			smallest = i;
		}

		if (lowest4 > arr[i].total)
		{
			lowest4 = arr[i].total;
			smallest = i;
		}
	}

	// Loop lowest values into an array of size 4 
	for (int index = 0; index < INFO; index++)
	{
		if (index == 0)
			lowest[0] = lowest1;
		else if (index == 1)
			lowest[1] = lowest2;
		else if (index == 2)
			lowest[2] = lowest3;
		else if (index == 3)
			lowest[3] = lowest4;
		else
			cout << "Fail!" << endl;
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void calcHighest(StudentData arr[], int &highest1, int &highest2, int &highest3, int &highest4, int highest[])
{
	int biggest = 0;

	highest1 = arr[0].exam1;
	highest2 = arr[0].exam2;
	highest3 = arr[0].exam3;
	highest4 = arr[0].total;

	// Loop to determine highest score from Exam1, 2, 3, and Total 
	for (int i = 0; i < SIZE; i++)
	{
		if (highest1 < arr[i].exam1)
		{
			highest1 = arr[i].exam1;
			biggest = i;
		}

		if (highest2 < arr[i].exam2)
		{
			highest2 = arr[i].exam2;
			biggest = i;
		}

		if (highest3 < arr[i].exam3)
		{
			highest3 = arr[i].exam3;
			biggest = i;
		}

		if (highest4 < arr[i].total)
		{
			highest4 = arr[i].total;
			biggest = i;
		}
	}

	// Loop highest values into an array of size 4 
	for (int index = 0; index < INFO; index++)
	{
		if (index == 0)
			highest[0] = highest1;
		else if (index == 1)
			highest[1] = highest2;
		else if (index == 2)
			highest[2] = highest3;
		else if (index == 3)
			highest[3] = highest4;
		else
			cout << "Fail!" << endl;
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void getAverage(StudentData arr[], int size, double &average1, double &average2, double &average3, double &average4, double average[])
{
	int sum1 = 0, sum2 = 0, sum3 = 0, sum4 = 0;

	// Get sum of each category (Exam1, 2, 3, and Total)
	for (int i = 0; i < SIZE; i++)
	{
		sum1 += arr[i].exam1;
		sum2 += arr[i].exam2;
		sum3 += arr[i].exam3;
		sum4 += arr[i].total;
	}

	// Calculate average for each category 
	average1 += static_cast<double>(sum1) / size;

	average2 += static_cast<double>(sum2) / size;

	average3 += static_cast<double>(sum3) / size;

	average4 += static_cast<double>(sum4) / size;

	// Loop average values into an array of size 4 
	for (int index = 0; index < INFO; index++)
	{
		if (index == 0)
			average[0] = average1;
		else if (index == 1)
			average[1] = average2;
		else if (index == 2)
			average[2] = average3;
		else if (index == 3)
			average[3] = average4;
		else
			cout << "Fail!" << endl;
	}
}


/**
* Pre-condition:
* Post-condition:
*/
void sort(StudentData arr[])
{
	StudentData temp;

	for (int i = 0; i < (SIZE - 1); i++)
	{
		for (int j = i + 1; j < SIZE; j++)
		{
			if (arr[i].last_name > arr[j].last_name)
			{
				temp = arr[i];
				arr[i] = arr[j];
				arr[j] = temp;
			}
		}
	}
}

closed account (48T7M4Gy)

getStd() and print() functions aren't defined. You only have the headers.

Beginner2016 (21)

This one is giving me C2377 error, please help. I am about to give up

#include "stdafx.h"
#include <iostream>
#include <string> 
#include <fstream>
#include <iomanip>
#include <cmath>
#include <Windows.h>
using namespace std;



struct StudentData
{
	string first_name;
	string last_name;
	int exam1;
	int exam2;
	int exam3;
	int total;
	char ch;

};

const int SIZE = 9;
const int INFO = 4;


// Function prototypes
void openInputFile(ifstream &, string);
void getTotal(StudentData[]);
void getGrade(StudentData[]);
void calcLowest(StudentData[], int &, int &, int &, int &, int[]);
void calcHighest(StudentData[], int &, int &, int &, int &, int[]);
void getAverage(StudentData[], int, double &, double &, double &, double &, double[]);
void getStd(StudentData[], double &, double &, double &, double &, double &, double &, double &, double &, double[]);
void print(StudentData[], int[], int[], double[], double[]);
void sort(StudentData[]);

int main()
{
	// Variables 
	StudentData arr[SIZE];
	int lowest1, lowest2, lowest3, lowest4;		// Stores lowest exam scores
	int highest1, highest2, highest3, highest4; // Holds highest exam scores
	double average1 = 0, average2 = 0, average3 = 0, average4 = 0; // Represents average of each exam 
	double std1 = 0, std2 = 0, std3 = 0, std4 = 0; // Holds standard deviation for Exams 1-3 and Total 
	int lowest[INFO] = {};
	int highest[INFO] = {};
	double average[INFO] = {};
	double standardDeviation[INFO] = {};

	ifstream inFile;
	string inFileName = "C:\\Users\\Christian\\Desktop\\ClassGrades.txt";

	// Call function to read data in file
	openInputFile(inFile, inFileName);

	// Read data into an array of structs 
	for (int count = 0; count < SIZE; count++)
	{
		inFile >> arr[count].first_name >> arr[count].last_name >> arr[count].exam1 >> arr[count].exam2 >> arr[count].exam3;
	}

	// Close input file
	inFile.close();

	// Get score total for each student 
	getTotal(arr);

	// Determine grade for each student
	getGrade(arr);

	// Calculate lowest scores in each exam and total scores
	calcLowest(arr, lowest1, lowest2, lowest3, lowest4, lowest);

	// Calculate highest scores in each exam and total scores  
	calcHighest(arr, highest1, highest2, highest3, highest4, highest);

	// Calculate average of each exam and the average of the total scores
	getAverage(arr, SIZE, average1, average2, average3, average4, average);

	// Calculate standard deviation of each category 
	getStd(arr, std1, std2, std3, std4, average1, average2, average3, average4, standardDeviation);
	cout << "\n";

	// Print unsorted data
	print(arr, lowest, highest, average, standardDeviation);
	cout << "\n";

	// Sort data 
	sort(arr);

	// Print sorted data
	print(arr, lowest, highest, average, standardDeviation);

	system("PAUSE");

	return 0;
}

/**
* Pre-condition:
* Post-condition:
*/
void openInputFile(ifstream &inFile, string inFileName)
{
	//Open the file
	inFile.open(inFileName);

	//Input validation
	if (!inFile)
	{
		cout << "Error to open file." << endl;
		cout << endl;
		return;
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void getTotal(StudentData arr[])
{
	for (int i = 0; i < SIZE; i++)
	{
		arr[i].total = arr[i].exam1 + arr[i].exam2 + arr[i].exam3;
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void getGrade(StudentData arr[])
{
	for (int i = 0; i < SIZE; i++)
	{
		if (arr[i].total >= 90)
			arr[i].ch = 'A';
		else if (arr[i].total >= 80)
			arr[i].ch = 'B';
		else if (arr[i].total >= 70)
			arr[i].ch = 'C';
		else if (arr[i].total >= 60)
			arr[i].ch = 'D';
		else
			arr[i].ch = 'F';
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void calcLowest(StudentData arr[], int &lowest1, int &lowest2, int &lowest3, int &lowest4, int lowest[])
{
	int smallest = 0;

	lowest1 = arr[0].exam1;
	lowest2 = arr[0].exam2;
	lowest3 = arr[0].exam3;
	lowest4 = arr[0].total;

	// Loop to determine lowest score from Exam1, 2, 3, and Total
	for (int i = 0; i < SIZE; i++)
	{
		if (lowest1 > arr[i].exam1)
		{
			lowest1 = arr[i].exam1;
			smallest = i;
		}

		if (lowest2 > arr[i].exam2)
		{
			lowest2 = arr[i].exam2;
			smallest = i;
		}

		if (lowest3 > arr[i].exam3)
		{
			lowest3 = arr[i].exam3;
			smallest = i;
		}

		if (lowest4 > arr[i].total)
		{
			lowest4 = arr[i].total;
			smallest = i;
		}
	}

	// Loop lowest values into an array of size 4 
	for (int index = 0; index < INFO; index++)
	{
		if (index == 0)
			lowest[0] = lowest1;
		else if (index == 1)
			lowest[1] = lowest2;
		else if (index == 2)
			lowest[2] = lowest3;
		else if (index == 3)
			lowest[3] = lowest4;
		else
			cout << "Fail!" << endl;
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void calcHighest(StudentData arr[], int &highest1, int &highest2, int &highest3, int &highest4, int highest[])
{
	int biggest = 0;

	highest1 = arr[0].exam1;
	highest2 = arr[0].exam2;
	highest3 = arr[0].exam3;
	highest4 = arr[0].total;

	// Loop to determine highest score from Exam1, 2, 3, and Total 
	for (int i = 0; i < SIZE; i++)
	{
		if (highest1 < arr[i].exam1)
		{
			highest1 = arr[i].exam1;
			biggest = i;
		}

		if (highest2 < arr[i].exam2)
		{
			highest2 = arr[i].exam2;
			biggest = i;
		}

		if (highest3 < arr[i].exam3)
		{
			highest3 = arr[i].exam3;
			biggest = i;
		}

		if (highest4 < arr[i].total)
		{
			highest4 = arr[i].total;
			biggest = i;
		}
	}

	// Loop highest values into an array of size 4 
	for (int index = 0; index < INFO; index++)
	{
		if (index == 0)
			highest[0] = highest1;
		else if (index == 1)
			highest[1] = highest2;
		else if (index == 2)
			highest[2] = highest3;
		else if (index == 3)
			highest[3] = highest4;
		else
			cout << "Fail!" << endl;
	}
}

/**
* Pre-condition:
* Post-condition:
*/
void getAverage(StudentData arr[], int size, double &average1, double &average2, double &average3, double &average4, double average[])
{
	int sum1 = 0, sum2 = 0, sum3 = 0, sum4 = 0;

	// Get sum of each category (Exam1, 2, 3, and Total)
	for (int i = 0; i < SIZE; i++)
	{
		sum1 += arr[i].exam1;
		sum2 += arr[i].exam2;
		sum3 += arr[i].exam3;
		sum4 += arr[i].total;
	}

	// Calculate average for each category 
	average1 += static_cast<double>(sum1) / size;

	average2 += static_cast<double>(sum2) / size;

	average3 += static_cast<double>(sum3) / size;

	average4 += static_cast<double>(sum4) / size;

	// Loop average values into an array of size 4 
	for (int index = 0; index < INFO; index++)
	{
		if (index == 0)
			average[0] = average1;
		else if (index == 1)
			average[1] = average2;
		else if (index == 2)
			average[2] = average3;
		else if (index == 3)
			average[3] = average4;
		else
			cout << "Fail!" << endl;
	}
}


/**
* Pre-condition:
* Post-condition:
*/
void sort(StudentData arr[])
{
	StudentData temp;

	for (int i = 0; i < (SIZE - 1); i++)
	{
		for (int j = i + 1; j < SIZE; j++)
		{
			if (arr[i].last_name > arr[j].last_name)
			{
				temp = arr[i];
				arr[i] = arr[j];
				arr[j] = temp;
			}
		}
	}
}

closed account (48T7M4Gy)

Best google the error code, the error message tells you which line to fix. Good luck with it.

Beginner2016 (21)

Thank you kemort, I did that the entire day today and even changed "SIZE" on Line 24 to "CLASS" but still can't get it to work. Actually, I am stuck here and the due date is tonight. Any help please?

closed account (48T7M4Gy)

Any help please?

Sorry, not from this end. Best just hand in what you have and enjoy what's left of the weekend. Cheers :)

gunnerfunner (2127)

OP: all your functions return void, so don't expect any output from them

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