How to store values of a predefined data type into an array and output it

Question

I am trying to store the name,age and wage of data type Emp into an array and ask the user to first input them all and then output them all.

This is what Final wanted output looks like using plain arrays

Number of users to be inputted:3

first one inputted reset*

second one inputted reset*

third one inputted reset*

--------------------------------------------------->>

Displaying information

Name age salary

QWe 69 420

Dvor 42 6900

RT 24 6898

------------------------------------------------------------>>

As for information of three employees inputted.I got a solutions using vectors but can i do it by storing it in arrays

//Current code

// Included header files
#include <iostream>
#include <string>
#include<algorithm>
#include<vector>

using namespace std;

// Global variable declaration
int sized = 0;

// Struct declaration
struct Employee
{
    string name;
    int age;
    double salary;
};

// Protype
void Showinfo(Employee);

int main()
{
    // Declaring a variable of type Employee
    Employee Emp;

    // Inputting the number of employees that are being inputted
    cout << "Enter the number of the employees that you want to enter into the database: ";
    cin >> sized;

    cout << endl << endl;

    // Reseting the screen
    system("cls");

    // For loop to get the name,age and salary of the given number of employees
    std::vector<Employee> employees;
    for (int i = 0; i < sized; i++)
    {
        cout << "Enter Full name of employee: ";
        cin.ignore();
        getline(cin, Emp.name);
        cout << endl;
        cout << "Enter age of employee: ";
        cin >> Emp.age;
        cout << endl;
        cout << "Enter salary of employee: ";
        cin >> Emp.salary;
        cout << endl;
        employees.push_back(Emp);
        system("cls");
    }

    cout << "Name\t" << "Age\t" << "Wage" << endl;

    for (const auto& e : employees) {
        Showinfo(e);
    }

    cout << "\n" << endl;

    // Pause the console
    cout << "The program has ended" << endl << endl;
    system("pause");
    return 0;
}

// To display/showcase the information received
void Showinfo(Employee Emp)
{
    cout << Emp.name << '\t'
        << Emp.age << '\t'
        << Emp.salary << '\t' << endl;
}

I am trying to get the same output but using an array of type Employee to store the employee information and outputting them without using resizeable arrays/vectors

Like in this code I do need some assistance with a creating a loop that displays the information i do have an array of type Employee declared in global scope after declaring the integer sized.How can i stored these values(Employees info:name,age and salary and output them or is it not possible that way)

Answer 1

The basic operation for arrays is indexing. Indexing is accessing an array element by its position in the array. An array with N elements in C++ has the elements with positions from 0 to N-1. An indexing operation is designated with square brackets with the index value written inside, like array[0] or array[N-1] or array[i], where i is allowed to take a value from 0 to N-1.

A rough example:

#include <iostream>

using namespace std;

struct Employee
{
    string name;
    int age;
    double salary;
};

Employee employees[40];

int main()
{
    int size;
    cin >> size;
    if (size > 40) {
        return -1;
    }

    for (int i = 0; i < size; ++i) {
        cin >> employees[i].name >> employees[i].age >> employees[i].salary;
    }

    for (int i = 0; i < size; ++i) {
        cout << employees[i].name << " "
             << employees[i].age << " "
             << employees[i].salary << endl;
    }

    return 0;
}

Hopefully you already know what for (int i = 0; i < size; ++i) means.

Answer 2

Here is the final code

#include <iostream>
#include <iomanip>

using namespace std;

//Global variable declaration
const int arraysize = 40;

struct Employee
{
    string name;
    int age;
    double salary;
};

//Protype
void Showinfo(Employee employees[40], int& size);

//Global array declaration
Employee employees[arraysize];

int main()
{
    int size;
    cout << "Input the size: ";
    cin >> size;

    cout << endl << endl;

    // Reseting the screen
    system("cls");

    if (size > 40) {
        return -1;
    }

    for (int i = 0; i < size; ++i) {
        cout << "Enter a name: ";
        cin >> employees[i].name;
        cout << endl;
        cout << "Enter age: ";
        cin >> employees[i].age;
        cout << endl;
        cout << "Enter the salary: ";
        cin >> employees[i].salary;
        cout << endl;
        system("cls");
    }

    cout << "Displaying Information" << endl;
    cout << "----------------------------------" << endl;

    Showinfo(employees, size);

    cout << "----------------------------------" << endl;
    cout << "\n" << endl;

    cout << "The program has ended" << endl << endl;
    system("pause");
    return 0;
}

void Showinfo(Employee employees[arraysize], int& size) {
    for (int i = 0; i < size; ++i) {
        if (i == 0)
        {
            cout << setw(4) << "Name\t" << "Age\t" << "Wage" << endl << endl;
        }
        cout << setw(4) << employees[i].name << '\t'
            << employees[i].age << '\t'
            << employees[i].salary << endl;
    }
}