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#include <iostream>
#include <string>
#include <fstream>
#include <vector>
using namespace std;
struct Student
{
string firstName;
string lastName;
double exam1;
double exam2;
double exam3;
Student(string fn, string ln, double s1, double s2, double s3)
{
lastName = ln;
firstName = fn;
exam1 = s1;
exam2 = s2;
exam3 = s3;
}
};
void newRecord(vector<Student>& );
void displayRecord(vector<Student>& );
void deleteRecord(vector<Student>& );
void scoreAverage(vector<Student>&);
void saveAndExit(vector<Student>&);
int main()
{
vector<Student> students;
int option = 0;
do
{
cout << "----------Menu Options--------------" << endl;
cout << " 1. Enter students name and scores " << endl;
cout << " 2. Display students information " << endl;
cout << " 3. Remove a students information " << endl;
cout << " 4. Display Exam Averages " << endl;
cout << " 5. Save and Exit " << endl;
cout << " Enter your choice 1, 2, 3, 4 ,5 " << endl;
cin >> option;
cout << endl << endl;
switch(option)
{
case 1:
newRecord(students);
break;
case 2:
displayRecord(students);
break;
case 3:
deleteRecord(students);
break;
case 4:
scoreAverage(students);
break;
case 5:
saveAndExit(students);
return 0;
default:
cout << "Please enter 1, 2, 3, 4, or 5" << endl << endl;
break;
}
}while(option != 4);
}
void newRecord(vector<Student>& students)
{
string fn, ln;
double s1, s2, s3;
char ans;
do
{
cout << " Enter First Name: ";
cin >> fn;
cout << " Enter Last Name: ";
cin >> ln;
cout << " Enter Score 1: ";
cin >> s1;
cout << " Enter Score 2: ";
cin >> s2;
cout << " Enter Score 3: ";
cin >> s3;
Student temp(fn,ln,s1,s2,s3);
students.push_back(temp);
cout << " Would you like to enter another record? Y or N : ";
cin >> ans;
ans = tolower(ans);
cout << endl << endl;
}while(ans == 'y');
}
void displayRecord(vector<Student>& students)
{
cout << " There are " << students.size() << " at this time. " << endl << endl;
if(students.size() > 0)
{
cout << " RecNum\tFName\tLName\tScore1\tScore2\tScore3\t" << endl;
for(int i = 0; i < students.size(); i++)
cout << " " << (i + 1) << "." << '\t' << students[i].firstName
<< '\t' << students[i].lastName
<< '\t' << students[i].exam1
<< '\t' << students[i].exam2
<< '\t' << students[i].exam3 << endl;
}
cout << endl;
}
void deleteRecord(vector<Student>& students)
{
int index = 0;
cout << "There are " << students.size() << " records at this time. " ;
if(students.size() == 0)
{
cout << " No records can be removed. " << endl << endl;
return;
}
else
{
cout << "The names are: " << endl << endl;
for(int i = 0; i < students.size(); i++)
cout << i + 1 << '\t' << students[i].firstName << " " << students[i].lastName << endl;
cout << endl << " Enter the number of the file that you wish to delete: 1 through " << students.size();
cin >> index;
if(index <= 0 || index > students.size())
{
cout << " The number you entered is not within the proper range." << endl;
return;
}
index = index - 1;
for(int i = index; i < students.size() - 1; i++)
students[i] = students[i+1];
students.pop_back();
}
cout << " There are now " << students.size() << " records." << endl;
}
void scoreAverage(vector<Student> &students)
{
double total = 0;
for (int i = 0; i < students.size(); i++)
total += (students[i].exam1 + students[i].exam2 + students[i].exam3)/3.0;
cout << total * 1.0 / students.size() << endl;
}
void saveAndExit(vector<Student>& students)
{
ofstream outFile;
outFile.open("studentScores.txt");
if(outFile.is_open())
{
for(int i = 0; i < students.size(); i++)
outFile << students[i].firstName << '\t'
<< students[i].lastName << '\t'
<< students[i].exam1 << '\t'
<< students[i].exam2 << '\t'
<< students[i].exam3 << endl;
cout << students.size() << " The records were saved to studentScores.txt" << endl << endl;
}
}
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