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Write a calculator program that is able to process an input in postfix notation and give the result. You are free to use the built in stack class or create your own ones. Your program should be able to detect the invalid postfix input and report "invalid", if the input is valid your program should output the correct result. For your convenience, you may suppose the input consists only positive integers and the operators are only +,-,*,/. But during the process, the results can be negative, for example "4 6 -" is allowed. The first line of the input contains K the number of cases, the next K lines each contains a string of postfix notation. You will be asked to read the input from "a5input.txt". The output should be either the result of a valid string or "invalid" if the string is not in postfix notation. Sample Input: 4 7 8 9 + * 4 6 - * 3 4 + 5 6 + * 3 4 5 * + 2 3 + - 5 7 * Sample Output: -238 77 23 invalid
Draw a flow chart, hierarchy chart, and write pseudocode for the following problem. • A weather sensing system calculates & prints a report on the following: ? Average temperature ? Highest temperature ? Lowest temperature ?
List and describe briefly the three guidelines for sound policy, as stated by Bergeron and Bérubé. Are policies different from standards? In what way? Are policies different from procedures? In what way?
1. Process can be in different states to allocate the resources better. List the symbol and meaning for each of these states
Create the 128KB direct-mapped data cache which uses a 32 bit address and 16 bytes per block. Compute the following: How many bits are utilized for the byte offset?
the 36 bit computer uses the 28 bit mantissa and the 8 bit exponent. what is the number of significant decimal digits and what is the range of real numbers for this machine?
Please provide an example of where and how BNF might be used to solve real-world problems (by this I mean problems outside the languages and compiling domain). Please be specific and provide an example.
Use McNaughton's wrap around rule to construct a preemptive
A phonetic password generator picks two segments randomly for each six-letter password. the form of each segment is consonant, voul, consonant, where V= and C= (V)
Apply the Cartesian product construction to (i) and (j) to obtain an automata recognizing the union of their languages. i. {w|w every odd position of w is a 1} j. {w| w contains at least two Os and at most one 1}
How large a video memory is required to store a 640 X 480 image during display? A 1600 X 900 image? A 1440 X 1080 image?
Write an instruction sheet for the user so that she can make the modi cations to her home machine so that she can access the le on the ash drive containing the encrypted le system.
Write a program with three radio buttons and circle. ( You can choose whether you draw the circle or if the circle is a label image.) When the user clicks on the first radio button
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