Calculator.cpp

#include <iostream>
#include <windows.h> 
#include <iomanip>
using namespace std;

// Function to change text color
void color(int col) {
    SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), col);
}

// Loading animation
void loading() {
    color(14);
    cout << "\n\n   Loading Calculator";
    for(int i = 0; i < 5; i++) {
        cout << ".";
        Sleep(300);
    }
    cout << "\n\n";
}

int main() {
    double a, b, result;
    char op, again;

    system("cls");
    loading(); 

    do {
        system("cls");
        color(11);
        cout << "\n===============================================\n";
        cout << "              ?  CALCULATOR APP  ?             \n";
        cout << "===============================================\n\n";

        color(14);
        cout << " Available Operations:\n\n";
        color(10); cout << "   [+] Addition\n";
        color(12); cout << "   [-] Subtraction\n";
        color(13); cout << "   [*] Multiplication\n";
        color(9);  cout << "   [/] Division\n\n";

        color(15);
        cout << "-----------------------------------------------\n";

        cout << " Enter First Number  : ";
        cin >> a;
        cout << " Enter Second Number : ";
        cin >> b;

        cout << " Choose Operation (+, -, *, /): ";
        cin >> op;

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

        color(11);
        switch(op) {
            case '+': result = a + b;
                      cout << " Result: " << a << " + " << b << " = " << result << endl;
                      break;

            case '-': result = a - b;
                      cout << " Result: " << a << " - " << b << " = " << result << endl;
                      break;

            case '*': result = a * b;
                      cout << " Result: " << a << " * " << b << " = " << result << endl;
                      break;

            case '/': if(b != 0) {
                          cout << fixed << setprecision(2);
                          result = a / b;
                          cout << " Result: " << a << " / " << b << " = " << result << endl;
                      } else {
                          color(12);
                          cout << " ? ERROR: Division by Zero Not Allowed!\n";
                      }
                      break;

            default:
                color(12);
                cout << " ? Invalid Operation Selected.\n";
        }

        color(15);
        cout << "-----------------------------------------------\n";
        cout << " Do you want to Perform Another Calculation? (y/n): ";
        cin >> again;

    } while(again == 'y' || again == 'Y');

    color(10);
    cout << "\n===============================================\n";
    cout << "   ? THANK YOU FOR USING THE APPLICATION\n";
    cout << "   Created By: ** Khushi Chauhan **\n";
    cout << "   (Intern Project)\n";
    cout << "===============================================\n\n";

    color(7);
    return 0;
}