# A Simple Calculator

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 Submitted on: 1/2/2015 10:59:00 PM By: Saifudheen A A (from psc cd) Level: Beginner User Rating: By 7 Users Compatibility: C++ (general), Microsoft Visual C++, Borland C++, UNIX C++ Views: 1208

A simple Calculator ; Well Commented easy to follow, for beginers. It also shows some basics of C++ programs. If you find this article helpful to you please send me a message.

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 ``` //************************************** // Name: A Simple Calculator // Description:A simple Calculator ; Well Commented easy to follow, for beginers. It also shows some basics of C++ programs. If you find this article helpful to you please send me a message. // By: Saifudheen A A (from psc cd) // // Side Effects:As the program will not make any error check, Dont enter any charactors other than numbers. //************************************** // This is a comment an will not make any sense to program // Simple Calculator By A. A . Saifudheen // keraleeyan@msn.com // This Code is NOT copywrited and may distribute // freely unless any comments are NOT Removed including above comments #include // This file used for function definitions 'cout' and 'cin' in program //Simple Calculator By A. A . Saifudheen float a; // floating point variable -Means a Variable that capable of storing a number having some decimal places float b; // float result; int op; // Integer Variable -Means Variable that capable of storing a number. ( No decimal places) int option; int main() // It is the main function. A function Named 'main' is required for all C++ programs { do //'Do While' loop Used for Looping the program for multiple Calculations // 'Do While' loop Starts Here { cout << "Enter First Number \n"; cin >> a; // Input cout << "Enter Second Number \n"; cin >> b; cout << "Please enter an Option..\n"; cout << "[1] Add \n"; cout << "[2] Substract \n"; cout << "[3] Multiply \n"; cout << "[4] Devide \n "; // Add more function like Power, Modulus etc if needed. cin >> op; // The keybord input is passed to variable 'op' switch (op)// switch is similar to Select Case in VB { case 1 : // Case Addition result=a+b; break; case 2 : //Case Substraction result=a-b; break; case 3 : // Case multiplication result=a*b; break; case 4 : // Case Division result=a/b; } cout <<"The Result is..= " << result << "\n\n"; //Display Result and Skipping two Lines cout << "Enter an Option..\n"; cout << "[0] Exit.\n"; cout << "[1] Continue. \n"; cin >> option; // Do While loop Ends Here } while (option==1); // If option is 1 ie 'Continue' the above code is Looped else ( option<>1 ) it is Escaped from Loop return 0;// the ' main' function returns value 0 } // End of Code```

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