Class Discussion cis 242 - Essay Example

Discussion Making Decisions in C++ using Conditions, Operators and Values" Please respond to the following: Explain how decisions are made in C++ programming using conditions, operators, and values. Give a coded example to support your response. Define the significance of Boolean operators and explain how they relate to the conditions in your discussion. Give an example using C++ syntax to support your response. Note: values can be either variables or constants. The structure of Decision Making in C++ requires (at-least) one or more conditions for evaluation, if the condition is determined to be true the statement(s) needs to be executed, however, the if the condition is becomes false, there is an option for other statement(s) to be executed.

The conditions are composed of operators and values that are used. Operators and values are used to define a condition. The operators can be Relational and Logical operators that are used to compare two values; however, Logical operators are also used to combine two or more conditions. An example is given below for illustration of decision making structure using conditions, operators and values:If (a < 10) {statement(s) …….}else{statement(s) …….}/* “ 10 && a < 20) // it asks either the value “a” is between 10 and 20.

statements (A)elsestatements (B)/* “&&” a logical operator used to compare two conditions, the first condition is either “a” is greater than “10” and the second condition is either “a” is less than 20. If both the conditions get true, the “statements (A)” will be executed and if anyone of the conditions gets false, the “statements (B)” will be executed. As “&&” (and) logical operator has been used, therefore, both the conditions need to be true to execute “statements (A)”.

Boolean operators have significance importance in C++, as these can be used in the conditions to determine either the condition is true or false. In programming, you need decision making structures that are based on conditions, whereas in the conditions we use Boolean operators. The above example explains the conditions along with Boolean Operators in detail.Discussion 2Loops are used to add excitement to roller coaster in amusements parks such as Six Flags. :D Just kidding of course, but in C++, they do the same kind of thing: Start at one point, execute some code, then end up back at where you started.

They are useful for when you need to execute a piece of code multiple times. The different loop commands have the same basic function, but execute slightly differently. The while command is the simplest of the loops.Just like we say when we talk while (this) is true, do (this). For example: While the TV is on, I will watch it. Once the TV goes off, I will stop watching it. A good use of while is when asking for an entry, check to see that one of the expected entries is the one that the user used.

The while loop checks to see if the condition is true before it executes its code. Kind of like this:char answer;coutanswer;while (answer != "Y" && answer !="N"){ coutchar;}The while loop will continue to prompt for either a Y or a N until the user gets it right. The do-while is similar to the while loop, but it will execute the code one time before checking to see if the condition is true. Use of this is good for something like an ATM machine. When you put your card in, the program executes, then at the end it asks "Another transaction?". Example:do{/*Writing this not in code to shorten it.

 Welcome to ATM, what do you want to do?Execute the users request.*/char answer;coutanswer;//while loop here to make sure you get a Y or N.} while (answer == "Y");The program will go through execution one time, then ask if another transaction is desired. If the answer is yes, it will start all over again, otherwise the loop will exit. The last command is the for loop. Its a little more complex then the previous two, but its very powerful because you can initialize variables within it, check for condition, and then modify variables as well.

For loops are great for when you want to repeat something a set number of times. A simple and silly example is if you want to say Hello to the user 10 times when he first logs in. The code would look like this:inti;     //the variable i can be anything, but most programmers use it for "index" indicating that its used to count.for (i = 0; i< 10; i++) cout