Int count= countOccurences(code, "leftoverSlices = pizzaSlices % numPeople ") Passed = getResults("1 assignment slicesPerPerson", count+ " assignment slicesPerPerson", "compute slicesPerPerson", void test2() Int count= countOccurences(code, "slicesPerPerson = pizzaSlices / numPeople ") Int pizzaSlices, numPeople, slicesPerPerson, leftoverSlices
#LONG DIVISION USING EQUATION EDITOR 3.0 CODE#
Note the first line of code declares all 4 variables as type int.Īdd assignment statements and print statements to compute and print the slices per person and leftover slices. It doesn’t hurt to put in extra parentheses if you are unsure as to what will be done first.Ĭomplete the program based on the process shown in the Figure 3 flowchart. However, anything in parentheses is done first. When compound expressions are evaluated, operator precedence rules are used, so that *, /, and % are done before + and.
You can either use a literal value which is a fixed value like 2, or variables in them. Operators can be used to create compound expressions with more than one operator.
#LONG DIVISION USING EQUATION EDITOR 3.0 WINDOWS#
Try it in one of the active code windows above. An attempt to divide an integer by zero will result in an ArithmeticException error message. With division, another thing to watch out for is dividing by 0. If you need a double answer, you should make at least one of the values in the expression a double like 2.0. When Java sees you doing integer division (or any operation with integers) it assumes you want an integer result so it throws away anything after the decimal point in the answer, essentially rounding down the answer to a whole number. Use = and != only with int values and not doubles because double values are an approximation and 3.3333 will not equal 3.3334 even though they are very close. Two equal signs are used to test a variable to see if it is a certain value and that returns true or false as you’ll see below.
One equal sign is used to assign a value to a variable. Don’t get one equal sign = confused with two equal signs =! They mean different things in Java. Java uses the operator = to test if the value on the left is equal to the value on the right and != to test if two items are not equal. (You may have noticed that + was also used to put text together in the input program above – more on this when we talk about strings.) An arithmetic operation that uses at least one double value will evaluate to a double value. An arithmetic operation that uses two int values will evaluate to an int value. Arithmetic expressions can be of type int or double. Java uses the standard mathematical operators for addition ( +), subtraction ( -), multiplication ( *), and division ( /). Passed = getResults("1 w assignment to temp", "" + count + " w assignment to temp", "Assign variable w to temp", passed) Passed = getResults("1 temp assignment to h", "" + count + " temp assignment to h", "Assign variable temp to h", void test4() Passed = getResults("1 temp declaration", "" + count + " temp declaration", "Declare variable temp", void test3() Int count = countOccurences(code, expect) You need to add a new variable named temp to use for the swap.īoolean passed = getResults(expect, output, "Expected output from void test2() Passed = getResults("1", "" + count, "correct totalPay calculation", void testStrConcat() throws IOExceptionīoolean passed1 = checkCodeContains("print statement concatenation of totalPay variable", target1) įix the code below to perform a correct swap of h and w. Int count = countOccurences(code, "totalPay = weeklySalary * numWeeks") +ĬountOccurences(code, "totalPay = numWeeks * weeklySalary") String concatenation with the totalPay variable to produce the output Total Pay = $3000.ĭon’t hardcode the number 3000 in your print statement.īoolean passed = getResults(expect, output, "Expected output from void testPrintStringsB() throws IOException Public class RunestoneTests extends void test1()īoolean passed = getResults(expect, output, "Expected output from void test2() throws IOExceptionīoolean passed1 = checkCodeContains("numQuarters * 25", void test3() throws IOExceptionīoolean passed1 = checkCodeContains("numNickels * 5", target1) Ĭalculate and print the total pay given the weekly salary and the number of weeks worked. Int total = numDimes * 10 + numQuarters + 25 Fix the error to compute the correct amount.
There is an error in the calculation of the total. The program is supposed to figure out the total money value given the number of dimes, quarters and nickels.
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