Part 1 should be completed in the lab period, part 2 in your own time and submitted at the START of your next lab period.

After the first lab period you should be

        Familiar with the basic operation of the Borland C/C++ 4.5 Compiler
        Familiar with standard variables type "int" and "double".       
        Familiar with standard variables type "int" and "double".       
        Familiar with for, while, switch, if commands in C..

Part 1: The following program implements a cheap calculator that reads in integers and operations from the keyboard, such as 7 * 3 + 6 = print the answer, and exit. Just as on a cheap calculator, addition and multiplication have the same precedence, and evaluation is strictly left to right. For example, 4+5*6 = prints 54 because 4+5=9 is computed before the multiplication.

#include < stdio.h >

int main()
{         int first, Second; //declare new variables
        char Operation;
                            
        cin >> first >> Operation;
        while (operation != '=')
        {    cin >> second;
             switch(operation)
             {  case '+': first = first + second; 
                case '-': first = first - second; break;     /* good 
                case '*': first = first * second; break;      program*/
                case '/': first = first / second; break;
                default:  cout << "Input error. \n"; return 1
             }
             cin >> operation;
        }    
        cout  "\n"
        cout << first << "\n";
        return 0
}

• Type into the computer the program below and try to get it compiling correctly.
• Correct any run time errors in the program i.e. Solve this problem without a computer program and then test your program.
• Try changing the formatting in the "cout" statements.
• Add some sensible comments to the program.
• Make the output user friendly.
• Modify the program to experiment with various output formats for the different variable types.
• Modify the program to calculate the operations with real numbers.
• Extend the calculator to compute the remainder function. The C++ instruction x % y computes the remainder of the division x/y. In Pascal this operator is called mod. Use the same % symbol for the remainder command. For example, the input 4 * 2 % 3 = should print 2.
• C++ does not have a built-in power function. Implement a power function. Enhance the calculator to compute a power when a ^ command is entered.
• Calculate the factorial of n using operator !.  The factorial function is calculated as follows: n! = 1*2*3*...*(n-1)*n.
• Implement max and min operations in the calculator.

Part 2. Modify the program written for part 1 to handle the following modifications.

• Modify the program to calculate correctly the expression according to the order of operations in the mathematical rules. For example, 4+5*6 = prints 34 instead of 54 because the multiplication has priority over addition..
• Implement the use of () in the expressions to change the order of calculations. For example, (4+5)*6= prints 54, because first the operation in () is executed.
• Extend a calculator to compute the value of any number raised to the power of another number, the latter being a positive integer or 0. If a negative integer is occurred, display the message with error that may occurred. The operator power has to be used.

                                            1, if b=0
         a power b =  a^b  =       a, if b =1                                    
                                            square(a^b/2), if b is even and b > 1
                                            a*square(a^b/2), if b is odd and b > 1

YOU WILL BE REQUIRED TO SUBMIT THIS PROGRAM AT THE START OF YOUR SECOND LAB SESSION.

Comments.

In the lab you will be using C/C++ Borland 4.5 compiler. You can run this compiler by using: Start->Miscellaneous Software -> Programming Tools -> C & C++ -> Borland C & C++ 4.5

Type your program into the text edit window. Remember to save it to your home directory, give it a sensible name: File->Save As

Compile your program. Project->Compile

Highlight the error in the message window and the line in error in the text edit window is displayed. Recompile until there are no errors.

See the Debug menu for run and debug options.