Write a program that reads the student information from a tab separated values (tsv) file. The program then creates a text file that records the course grades of the students. Each row of the tsv file contains the Last Name, First Name, Midterm1 score, Midterm2 score, and the Final score of a student. A sample of the student information is provided in StudentInfo. tsv. Assume the number of students is at least 1 and at most 20. The program performs the following tasks:
Read the file name of the tsv file from the user.
Open the tsv file and read the student information.
Compute the average exam score of each student.
Assign a letter grade to each student based on the average exam score in the following scale:
A: 90= B: 80=< X < 90
C: 70=< X < 80
D: 60=< X < 70
E: X < 60
Compute the average of each exam.
• Output the last names, first names, exam scores, and letter grades of the students into a text file named report. txt.
• Output one student per row and separate the values with a tab character.
• Output the average of each exam, with two digits after the decimal point at the end of report. txt. Hint: Use the setprecision manipulator to format the output.
Ex: If the input of the program is:
StudentInfo. tsv
and the contents of Studentinfo tsv are:
Barrett Edan 70 45 59
Bradshaw Reagan 96 97 88
Charlton Caius 73 94 80
Mayo Tyrese 88 61 36
Stern Brenda 90 86 45
the file report. txt should contain:
Barrett Edan 70 45 59 F
Bradshaw Reagan 96 97 88 A
Charlton Caius 73 94 80 B
Mayo Tyrese 88 61 36 D
Stern Brenda 90 86 45 C
Averages: midtermi 83.40, midterm2 76.60, final 61.60

#include
#include
#include
#include
#include
#include

using namespace std;

// Class student required to store the data
class Student{
public:
string lname;
string fname;
int marks[3];
char grade;

// Function which generates the grade for student
void calculate_grade(){
double sum = 0;
for(int i=0;i<3;i++){
sum+= marks[i];
}
double average = sum/3;
if(average>=90 && average<100)
this->grade = 'A';
else if(average>=80)
this->grade = 'B';
else if(average>=70)
this->grade = 'C';
else if(average>=60)
this->grade= 'D';
else this->grade = 'F';
}
};

// This function reads the file , and creates a vector of Students data
vector read_file(string fileName){

// Opening the file
fstream fin;
fin.open(fileName);

// Temp variables
vector list;
vector row ;
string line, word, temp;

// Read the data into vector
while(getline(fin,line)){
row.clear();
stringstream s(line);

while(getline(s,word,'\t')){

row.push_back(word);

}
Student st;
st.fname = row[0];
st.lname = row[1];
st.marks[0] = stoi(row[2]);
st.marks[1] = stoi(row[3]);
st.marks[2] = stoi(row[4]);
st.calculate_grade();
list.push_back(st);
}
fin.close();
return list;
}

// This function takes filname to be output as input, and list of student
void writeFile(string filename, vector list){

// Opening the new file
ofstream fin(filename);
for(int i=0;i string line = list[i].fname+"\t"+list[i].lname+"\t"+to_string(list[i].marks[0])+"\t"
+to_string(list[i].marks[1])+"\t"+to_string(list[i].marks[2])+"\t"+list[i].grade+"\n";
fin<
}

// Find the stats required
double average1 =0,average2 =0 ,average3 = 0;
for(int i=0;i average1+=list[i].marks[0];
average2+=list[i].marks[1];
average3+=list[i].marks[2];
}
average1/=list.size();
average2/=list.size();
average3/=list.size();

// Writting the stats
fin<<"\n"<<"Average: "<<"mid_term1 "<
// Closing the file
fin.close();
}
int main(){

// Taking the input
cout<<"Enter the filename: ";
string filename;
cin>>filename;
vector list;

// Reading and Writting to the file
list = read_file(filename);
writeFile("report.txt",list);

}

Answer (b) the meter will display a negative sign;

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