Question

In this exercise, you will have to create from scratch and utilize a class called Student1430. Student 1430 has 4 private member attributes: lastName (string) firstName (string) exams (an integer array of fixed size of 4) average (double) Student1430 also has the following member functions: 1. A default constructor, which sets firstName and lastName to empty strings, and all exams and average to 0. 2. A constructor with 3 parameters: a string for firstName, a string for lastName, and an array of 4 integers to set the exams, in this order; after assigning the values to the right attributes, the constructor should also update the average using the private helper function update Average (see below). 3. A function "getFirstName" that returns firstName. 4. A function "getLastName" that returns lastName. 5. A function "getAverage" that returns the updated average, based on the current exam grades. 6. A function "finalGrade" that returns the final letter grade of the students based on their average: A if >=90, B if <90 and >=80, C if <80 and >=70, D if <70 and >=60, F if <60. 7. A void function "setFirstName" with one parameter to set fistName to a new value. 8. A void function "setLastName" with one parameter to set lastName to a new value. 9. A void function "setExamGrade" with two parameters: the first is the new exam grade, the second is the exam number (between 1 and 4). 10. A void private helper function "update Average" that updates the average based on the scores of the four exams when necessary. You should consider calling it in the "getAverage" to make sure to always work with the correct average value. This function must be private and used only within the class. This is the only private function of the class. After you are done designing this class, you will modify the main function adding a try/catch block that throws a FileNotFoundException if it is not possible to open the file. The catch block should print the message "File not found." and terminate the program.

using C++ language!! please help me out with this homework

Answer 1

Code is as follows:

main.cpp

#include "Student1430.h"
class FileNotFoundException {};
using namespace std;
int main(int argc, char**argv)
{
string s1, s2;
int grade;
int a = 0;
Student1430 s;
ifstream infile(argv[1]);
// Define the try and cath blocks here
try {
if(!infile)
throw FileNotFoundException();
}
catch (FileNotFoundException f ) {
cout << "File not found.\n";
return -1;
}
  
  
while(!infile.eof())
{
infile >> s1 >> s2;
s.setFirstName(s1);
s.setLastName(s2);
for(int i =0; i<4; i++)
{
infile >> grade;
s.setExamGrade(grade, i+1);
}
cout << s.getFirstName() << " " << s.getLastName() << " has an average of " << s.getAverage();
cout << " and will get a " << s.finalGrade() << endl;
if(s.finalGrade() == "A")
a++;
}
cout << endl << "Total A in class: " << a << endl;
infile.close();
return 0;
}

2 class FileNotFoundException {1}} 3 using namespace std; 4 int main(int argc, char* argv), no van DWN string s1, s2; int grade; int a = 0; Student 1430 s; ifstream infile(argv[1]); // Define the try and cath blocks here try { if(!infile) throw FileNotFoundException(); catch (FileNotFoundException f) { cout << "File not found. \n"; return -1; while(!infile.eof()) { infile >> $1 >> s2; s.setFirstName(s1); s.setLastName(s2); for(int i =0; i<4; i++) infile >> grade; s.setExamGrade (grade, i+1); cout << s.getFirstName() << " " << s.getLastName() << " has an average of " « cout << " and will get a " << s.finalGrade() << endl; if(s.finalgrade() == "A") a++; s.getAverage();

cout << endl << "Total A in class: " << a << endl; infile.close(); return 0;

***********************************************************************************************************************************

Student1430.h

#ifndef STUDENT1430_H
#define STUDENT1430_H
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
class Student1430 {
private:
string firstName;
string lastName;
int exams[4];
double average;
void updateAverage();
public:
Student1430();
Student1430(string f, string l, int e[]);
void setFirstName(string f);
void setLastName(string l);
void setExamGrade(int grade, int pos);
string getFirstName();
string getLastName();
double getAverage();
string finalGrade();
};
#endif

2 #define STUDENT1430_H 3 #include <iostream> 4 #include <fstream> #include <string> 6 using namespace std; 7. class Student1430 { private: string firstName; string lastName; int exams[4]; double average; void updateAverage(); public: Student1430(); Student1430(string f, string 1, int e[]); void setFirstName(string f); void setLastName(string 1); 19 void setExamGrade(int grade, int pos); string getFirstName(); 21 string getLastName(); double getAverage(); string finalgrade(); 24 }; 25 #endif

***********************************************************************************************************************************

Student1430.cpp

#include "Student1430.h"

Student1430::Student1430(){
firstName=""; //initiualise to empty string and all to 0
lastName="";
exams[4]={0};
average=0;
}

Student1430::Student1430(string f, string l, int e[]){
firstName=f; //constructor for firstName and lastName
lastName=l;
for(int i=0;i<4;i++){
exams[i] = e[i];
}
updateAverage(); //call the updateAverage
}

void Student1430::updateAverage(){
average = 0; //update the avergae
for(int i=0;i<4;i++){
average+=exams[i];
}
average = average/4;//find sum and find average
}

void Student1430::setFirstName(string f){
firstName = f; //set the firstName
}

void Student1430::setLastName(string l){
lastName = l; //set the lastName
}

void Student1430::setExamGrade(int grade,int pos){
exams[pos-1]=grade; //set the exams grade of exams number
}

string Student1430::getFirstName(){
return firstName; //get firstName
}

string Student1430::getLastName(){
return lastName; //getLastName
}
double Student1430::getAverage(){
updateAverage(); //first updateAverage
return average; //getAverage
}

string Student1430::finalGrade(){ //find grade based on average
if(average>=90)
return "A";
else if(average<90 && average>=80)
return "B";
else if(average<80 && average>=70)
return "C";
else if(average<70 && average>=60)
return "D";
else if(average<60)
return "F";
}

***********************************************************************************************************************************

Screenshot of the code:

1 #include "Student1430.h" o dovou pw student 1430::Student1430({ firstName=""; //initiualise to empty string and all to a lastName=""; exams[4]={0}; average=0; 10 Student1430::Student1430(string f, string 1, int e[]) { 11 firstName=f; //constructor for firstName and LastName lastName=l; for(int i=0;i<4;i++) { exams[i] = e[i]; 12 15 16 updateAverage(); //call the updateAverage 17 } 18 19 void student 1430: :updateAverage() { average = 0; //update the avergae 21- for(int i=0;i<4;i++) { average+=exams[i]; 20 average = average/4;//find sum and find average, 25 } 27. void student1430::setFirstName(string f){ 28 firstName = f; // set the firstName 29 } 30 31 void student 1430::setLastName(string 1){i 32 lastName = 1; //set the lastName 33}

35 void student1430::setExamGrade(int grade, int pos) { 36 exams[pos-1]=grade; //set the exam grade of exam number 37 } 38 39 string Student1430::getFirstName() { 40 return firstName; //get firstName 41 } 42 43 string Student 1430::getLastName / 44 return lastName; //getLastName 45 } 46 double Student1430::getAverage() { 47 updateAverage(); //first updateAverage return average; //getAverage 49 } 52 string Student1430: :finalGrade({ //find grade based on average if(average >=90) return "A"; else if(average<90 && average >=80) return "B"; else if(average<80 && average >=70), return "C"; else if(average<70 && average >=60), return "D"; else if(average<60) return "F"; 63 } 64

Sample input file:

stud.txt

Bruce Adams 45 15 45 90
Shashi Tharoor 90 95 95 95
Adam Gilchrist 89 80 70 50

On providing file name as command line argument

TIPUL Command line arguments: stud.txt

output is

Bruce Adams has an average of 48.75 and will get a fi Shashi Tharoor has an average of 93.75 and will get a A Adam Gilchrist has an average of 72.25 and will get a c Total A in class: 1 ... Program finished with exit code o Press ENTER to exit console.

if not provided or the file name is wrong then the output

File not found. ... Program finished with exit code 255 Press ENTER to exit console. I