Getting started

Refer to Lab 1 if you need a reminder about how to start Cygwin Terminal or Notepad++.

Start by downloading CS101_Lab02.zip, saving it in the directory H:\CS101.

Start a Cygwin Terminal and run the following commands:

cd h:
cd CS101
unzip CS101_Lab02.zip
cd CS101_Lab02

Using Notepad++, open the file

H:\CS101\CS101_Lab02\Calculator.cpp

Run the command

make

when you are ready to compile the program. To run the program, run the command

./Calculator.exe

Expensive Calculator

Your task in this lab is to first read two double values from the user, and print out their sum, difference, product, and quotient. Then read two int values from the user, and print out their quotient and modulus.

Here is an example run of the program (user input in bold):

Enter first decimal value: 8.5
Enter second decimal value: 4
8.500 + 4.000 = 12.500
8.500 - 4.000 = 4.500
8.500 x 4.000 = 34.000
8.500 / 4.000 = 2.125

Enter first integer value: 7
Enter second integer value: 3
7 / 3 = 2
7 % 3 = 1

Thank you for using the expensive calculator.

Each double quantity should be printed with three digits of precision after the decimal point.

Hints

Store the first two input values in variables of type double.

Store the second two input values in variables of type int.

Use the printf function to prompt the user for the two values and also to print out the computed results. The %f conversion specifier may be used to print values of type double, and the %i conversion specifier may be used to print values of type int.

Note that to print a percent sign (%) character using printf you need to put two percent characters in the formatting string. For example

printf("%%");

would print a single % character in the output window.

Use the scanf function to read values typed by the user into your double and int variables. Use the %lf conversion specifier (that's "percent", "lower-case L","lower-case F") for the double values and %i for the integer values. Note: the %f conversion specifier will not work correctly for a double variable. Do not forget the & before the variable in the scanf statements.

Submit

To submit your work, type the command

make submit

Enter your Marmoset username and password (which you should have received by email.) Note that your password will not be echoed to the screen.

Important:

You must submit your work before leaving class. If you do not submit, you will not receive any credit for the lab.