How to get grade average and do a search method? - c++

Question

I have been working on this project for days now and I got most of it down however there are three problems that I am having. I am trying to calculate the average grade from a ifstream file, the program reads it successfully however when I pass the array from one function to another, it just displays 0 and F as I am trying to display the percentage and letter grade.
My second question is how do I get the array to only print out elements that are populated. So if I create an array of 10 and only populate the first three elements, how would I got to only get those first three elements to print only?
And my other question is when I try doing a search, it keeps saying record not found even I typed the name correctly. The record is being search by last name.
Any pointers or help would be greatly appreciated. Thanks!
My code:
#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
#include <conio.h>
using namespace std;
void greeting(string[], string[], double[], double[], double[], int);
int getinfo(string[], string[], double[], double[], double[], int);
int calculateaverageandgrade(string[], string[], double[], double[], double [], int);
void sortandsearch(string[], string[], double[], double[], double[], int);
void goodbye(string[], string[], double[], double[], double[]);
int main() {
string fname[10] = { "" };
string lname[10] = { "" };
double grade[10] = { 0 };
double grade2[10] = { 0 };
double grade3[10] = { 0 };
const int arraysize = 10;
greeting(fname, lname, grade, grade2, grade3, arraysize);
getinfo(fname, lname, grade, grade2, grade3, arraysize);
calculateaverageandgrade(fname, lname, grade, grade2, grade3, arraysize);
system("pause");
return 0;
}
void greeting(string fname[], string lname[], double grade[], double grade2 [], double grade3[], int arraysize) {
int choice = int();
char cont = 'y';
while (cont == 'y' || cont == 'Y')
{
cout << setw(60) << "Main Menu" << endl;
cout << setw(66) << "======================" << endl;
cout << "\t\t\t\tToday we will be calculating grades from a file" << endl << "\t\t\t\tthat you can provide for us using notepad." << endl << "\t\t\t\tBe sure to update your file every time you run the program" << endl;
cout << endl;
cout << setw(64) << "Reading file...." << endl;
cout << setw(66) << "======================" << endl;
cout << endl << endl << endl;
cout << setw(65) << "1. Calculate Grades." << endl;
cout << setw(63) << "2. Search Grades" << endl;
cout << setw(68) << "2. Exit from the Program." << endl;
cout << endl;
cout << setw(70) << "Please Enter your Selection: ";
cin >> choice;
if (cin.fail())
{
cout << "Invalid selection" << endl;
cin.clear();
cin.ignore(1000, '\n');
}
else
{
if (choice == 1)
{
calculateaverageandgrade(fname, lname, grade, grade2, grade3, arraysize);
}
else if (choice == 2) {
sortandsearch(fname, lname, grade, grade2, grade3, arraysize);
}
else if (choice == 3)
{
goodbye(fname, lname, grade, grade2, grade3);
}
else
{
cout << "Invalid Selection!" << endl;
}
}
cout << "\nDo you want to continue (Y/N)....";
cin >> cont;
}
}
int getinfo(string fname[], string lname[],double grade[], double grade2[], double grade3[], int arraysize) {
system("cls");
ifstream in;
in.open("data.txt");
int i = 0;
while (!in.eof()) {
in >> fname[i] >> lname[i] >> grade[i] >> grade2[i] >> grade3 [i];
++i;
}
arraysize = i;
return arraysize;
}
int calculateaverageandgrade(string fname[], string lname[], double grade[], double grade2[], double grade3[], int arraysize) {
system("cls");
const int i = 10;
double total[i];
for (int a = 0; a < arraysize; ++a) {
cout << "Name:" << setw(20) << "Score: " << setw(20) << "Grade: " << endl;;
cout << fname[a] << " " << lname[a];
total[a] = grade[a] + grade2[a] + grade3[a];
total[a] = total[a] / 3;
cout << setw(20) << total[a] << endl;
if (total[a] >= 90) {
cout << setw(40) << "A" << endl;
}
else if (total[a] >= 80) {
cout << setw(41) << "B" << endl;
}
else if(total[a] >= 70) {
cout << setw(41) << "C" << endl;
}
else if (total[a] >= 60) {
cout << setw(41) << "D" << endl;
}
else {
cout << setw(41) << "F" << endl;
}
}
system("pause");
return total[i];
}
void sortandsearch(string fname[], string lname[], double grade[], double grade2[], double grade3[], int arraysize) {
system("cls");
string nameSearch = string();
int i = int();
bool flag = false;
char key = char();
system("cls");
cout << "\nEnter Name to be Searched: ";
cin >> nameSearch;
while (i<arraysize)
{
if (lname[i] == nameSearch)
{
cout << "Record Found --- ";
cout << "Record # " << i + 1 << " contains " << nameSearch << "'s information." << endl;
flag = true;
}
++i;
}
if (flag == false)
{
cout << "\nRecord Not Found!" << endl;
}
cout << "\n\n\nPress any Key to Continue...";
key = _getch();
}
void goodbye(string fname[], string lname[], double grade[], double grade2[], double grade3[]) {
system("cls");
cout << setw(70) << "Thanks for using my program!" << endl;
system("pause");
exit(1);
}