Basic_cpp_Calculator/Calculator_by_Class.cpp at main · Coder07-Ali/Basic_cpp_Calculator · GitHub

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#include <iostream> // Basic library

#include <cstdlib> // used with system() functions

#include <windows.h> // used to convert console output

#include <cmath> // used for mathamatical functions

#include <ctime> // used to access live time and date

using namespace std;

class Calculator

{

private:

int options;

float val1;

float val2;

public:

Calculator()

{

}

long long factorial(int n)

{

if (n <= 1)

{

return 1;

}

return n * factorial(n - 1);

}

void info()

{

cout<<"<========== Information ==========>"<<endl;

cout<<"Name: Calculator\nVersion: 1.3\nDeveloped by: AJ Developer\n";

// TO print live date and time

time_t timestamp;

time(&timestamp);

cout <<"Date: "<< ctime(&timestamp);

cout<<"<========== Information ==========>\n\n";

}

void opt()

{

cout << "Choose your options:\n1) Addition\n2) Subtraction\n3) Multiplication\n4) Division\n5) Power\n6) Square root\n7) Factorial\n8) Log\n0) Exit" << endl;

cin >> options;

}

bool check()

{

if (options < 0 || options > 8)

{

cout<<"<========== Error ==========>"<<endl;

cout << "Please choose the number from 0 to 8" << endl;

return false;

}

return true;

}

void wrong_Input_1()

{

while(!(cin>>val1))

{

cout<<"Error: Please enter numbers only\n";

cin.clear();

cin.ignore(10000, '\n');

cout<<"\nTry Again: ";

}

void wrong_Input_2()

{

while(!(cin>>val2))

{

cout<<"Error: Please enter numbers only\n";

cin.clear();

cin.ignore(10000, '\n');

cout<<"\nTry Again: ";

}

bool operation()

{

// For exit

if (options == 0)

{

cout << "<========== Thanks for using our calculator ==========>" << endl;

system("pause");

return false;

}

return true;

}

// For functions that requires two values

else if (options >= 1 && options <= 5)

{

// Addition

if (options == 1)

{

cout<<"\n<========== Addition ==========>"<<endl;

cout << "\nEnter your first value:" << endl;

wrong_Input_1();

cout << "Enter your second value:" << endl;

wrong_Input_2();

cout<<"\n<========== Result ==========>"<<endl;

cout << val1 << " + " << val2 << " = " << val1 + val2 << endl;

}

// Subtraction

else if (options == 2)

{

cout<<"\n<========== Subtraction ==========>"<<endl;

cout << "\nEnter your first value:" << endl;

wrong_Input_1();

cout << "Enter your second value:" << endl;

wrong_Input_2();

cout<<"\n<========== Result ==========>"<<endl;

cout << val1 << " - " << val2 << " = " << val1 - val2 << endl;

}

// Multiplication

else if (options == 3)

{

cout<<"\n<========== Multiplication ==========>"<<endl;

cout << "\nEnter your first value:" << endl;

wrong_Input_1();

cout << "Enter your second value:" << endl;

wrong_Input_2();

cout<<"\n<========== Result ==========>"<<endl;

cout << val1 << " X " << val2 << " = " << val1 * val2 << endl;

}

// Division

else if (options == 4)

{

cout<<"\n<========== Division ==========>"<<endl;

cout << "\nEnter your first value:" << endl;

wrong_Input_1();

if (val1 < 0)

{

cout<<"\n<========== Error ==========>"<<endl;

cout << "Negative numbers not allowed" << endl;

return 1;

}

else

{

cout << "Enter your second value:" << endl;

wrong_Input_2();

if (val2 == 0)

{

cout<<"\n<========== Error ==========>"<<endl;

cout << "Division by 0 not allowed" << endl;

return 1;

}

else if (val2 < 0)

{

cout<<"\n<========== Error ==========>"<<endl;

cout << "Negative numbers not allowed" << endl;

return 1;

}

else

{

cout<<"\n<========== Result ==========>"<<endl;

div_t Div = div(int(val1),int(val2));

cout<<"Quotient: "<<Div.quot<<endl;

cout<<"Remainder: "<<Div.rem<<endl;

// cout << val1 << " ÷ " << val2 << " = " << float(val1) / float(val2) << endl;

}

// Power

if (options == 5)

{

cout<<"\n<========== Power ==========>"<<endl;

cout << "\nEnter your base:" << endl;

wrong_Input_1();

cout << "\nEnter your exponent:" << endl;

wrong_Input_2();

cout<<"\n<========== Result ==========>"<<endl;

cout << val1 << " ^ " << val2<<" = " << pow(val1, val2) << endl;

}

// For operations that requires one value

else if (options >= 6 && options <= 8)

{

// Square root

if (options == 6)

{

cout<<"\n<========== Square root ==========>"<<endl;

cout << "\nEnter your value:" << endl;

wrong_Input_1();

if(val1 < 0){

cout<<"\n<========== Error ==========>"<<endl;

cout<<"Negative numbers are not allowed"<<endl;

return 1;

}

else{

cout<<"\n<========== Result ==========>"<<endl;

cout << "√" << val1 << " = " << sqrt(val1) << endl;

}

// Factorial

else if (options == 7)

{

cout<<"\n<========== Factorial ==========>"<<endl;

cout << "\nEnter your value:" << endl;

wrong_Input_1();

if(val1>20){

cout<<"\n<========== Error ==========>"<<endl;

cout<<"Maximum 20 allowed"<<endl;

return 1;

}

else if(val1<0){

cout<<"\n<========== Error ==========>"<<endl;

cout<<"Negative numbers are not allowed"<<endl;

return 1;

}

else{

cout<<"\n<========== Result ==========>"<<endl;

cout << val1 << "!" << " = " << factorial(int(val1)) << endl;

}

// For log

else if(options == 8){

cout<<"\n<========== Log ==========>"<<endl;

cout<<"\nEnter your value:"<<endl;

wrong_Input_1();

if(val1<=0){

cout<<"\n<========== Error ==========>"<<endl;

cout<<"Please enter positive integers"<<endl;

return 1;

}

else if(val1 > 10000)

{

cout<<"\n<========== Error ==========>"<<endl;

cout<<"Limit Exceed: Maximum Value = 10000"<<endl;

return 1;

}

else{

cout<<"\n<========== Result ==========>"<<endl;

cout<<"log "<<val1<<" = "<<long(log(val1))<<endl;

}

return true;

}

~Calculator()

{

}

};

int main()

{

SetConsoleOutputCP(CP_UTF8); // Used with #include<windows.h>

Calculator obj;

while (true)

{

system("cls"); // To clear the screen after every operation

obj.info();

obj.opt();

if (!obj.check())

continue;

if (!obj.operation())

break;

system("pause"); // To hold the output console

}

return 0;

}

Basic_cpp_Calculator/Calculator_by_Class.cpp at main · Coder07-Ali/Basic_cpp_Calculator · GitHub

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