Algorithms Operators.ppt

Algorithms Operators.ppt - cosc175/operators 1 Algorithms...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
cosc175/operators 1 Algorithms computer as the tool process – algorithm Receive and put out information - i/o Arithmetic: addition,subtraction,multiplication,division Save information for future use Comparison Repeat any group of operations
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
cosc175/operators 2 Assignment operator = Value assigning differs from equality x = 3 vs if (x == 3) variable = expression;
Image of page 2
variable = expression variable -physical location in computer memory expression Constant x = 10; x = PI; Another variable to which a value has previously been assigned y = x; A formula to be evaluated y = (x*4) /2 ; cosc175/operators 3
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
cosc175/operators 4 Assignment Processor evaluates the right member of an assignment statement to get a single value It places this value in the memory location (variable name) given as the left member. Not a mathematical equation , can't be switched stamp = 14 is a valid assignment statement 14 = stamp is not The left member of an assignment statement must always be the name of a variable. It cannot be a constant or formula.
Image of page 4
Invalid assignment 14 = x; a + x = 2 + y; Why? cosc175/operators 5
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Given the declarations: void main() { int stuff; string name; int widget; int numWidgets; numWidgets = 10; numWidgets = numWidgets + 1; name = "toby“; stuff = numWidgets; widget = numWidgets * 2; } cosc175/operators 6
Image of page 6
cosc175/operators 7 Assignment Statement What happens in memory numWidgets = 10; the value 10 is placed in the memory location numWidgets numWidgets = numWidgets + 1; numWidget is evaluated. Contains a 10, one is added to 10, 11 is stored at the memory location numWidgets name = "toby“; the four characters t-o-b-y are stored in the memory location name (note: The double quotes are used as delimiters and are not stored in memory.) stuff = numWidgets;
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern