Your Mathematic school teacher want to use a program that can read the name and the mark of a student. Your teacher want the program to automatically find the grade of the mark and display the result(name, mark and grade). Help your teacher to develop a program that can solve his problem. The grading is as follow 80 – 100 A 60 – 79 B 40 – 59 C 0 – 39 D
#include "stdafx.h"
#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
#include <cmath>
using namespace std;
struct StudentData
{
int studentID;
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\\Lisa\\Desktop\\scores.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].studentID >> 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 >= 270)
arr[i].ch = 'A';
else if(arr[i].total >= 240)
arr[i].ch = 'B';
else if(arr[i].total >= 210)
arr[i].ch = 'C';
else if(arr[i].total >= 180)
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 getStd(StudentData arr[], double &std1, double &std2, double &std3, double &std4, double &average1, double &average2, double &average3, double &average4, double standardDeviation[])
{
double deviationSum1 = 0, deviationSum2 = 0, deviationSum3 = 0, deviationSum4 = 0;
for(int i = 0; i < SIZE; i++)
{
deviationSum1 += pow((arr[i].exam1 - average1), 2);
deviationSum2 += pow((arr[i].exam2 - average2), 2);
deviationSum3 += pow((arr[i].exam3 - average3), 2);
deviationSum4 += pow((arr[i].total - average4), 2);
}
std1 = sqrt(deviationSum1 / ((SIZE) - 1));
std2 = sqrt(deviationSum2 / ((SIZE) - 1));
std3 = sqrt(deviationSum3 / ((SIZE) - 1));
std4 = sqrt(deviationSum4 / ((SIZE) - 1));
// Loop average values into an array of size
for(int index = 0; index < INFO; index++)
{
if(index == 0)
standardDeviation[0] = std1;
else if(index == 1)
standardDeviation[1] = std2;
else if(index == 2)
standardDeviation[2] = std3;
else if(index == 3)
standardDeviation[3] = std4;
else
cout << "Fail!" << endl;
}
}
cout << "\n";
}
/**
* 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;
}
}
}
}
Write a program that accepts the number of people in each of the two age categories, performs the necessary computations, and displays a bill for the group's admission similar to the display below. Be sure to test for a variety of values. You may assume the cash payment is equal to or greater than the total bill.
To develop a program that can read the name and mark of a student and automatically find the grade, you can use a programming language like Python. Here's an example program that explains the steps to achieve this:
```python
# Step 1: Read the name and mark of the student from the user
name = input("Enter student name: ")
mark = int(input("Enter student mark: "))
# Step 2: Determine the grade based on the mark
grade = ""
if mark >= 80 and mark <= 100:
grade = "A"
elif mark >= 60 and mark <= 79:
grade = "B"
elif mark >= 40 and mark <= 59:
grade = "C"
else:
grade = "D"
# Step 3: Display the result
print(f"Name: {name}")
print(f"Mark: {mark}")
print(f"Grade: {grade}")
```
Explanation of the steps:
1. We use the `input` function to read the name and mark of the student entered by the user. The `input` function prompts the user for input and returns the entered value as a string. We convert the mark to an integer using the `int` function so that we can compare it with numerical grades later.
2. We use conditional statements (if-elif-else) to determine the appropriate grade based on the mark. The `if` statement checks if the mark is within the range 80-100 and assigns the grade "A" if true. Similarly, the `elif` statements check for other grade ranges and assign the grades accordingly. If none of the conditions are met, the `else` statement assigns the grade "D".
3. We use the `print` function to display the name, mark, and grade of the student. The `f-string` format is used to insert the variable values into the print statements.
By following these steps and running the program, your teacher will be able to automatically find the grade based on the student's mark and display the result.