logic

问题 I am creating a pseudocode in determining the smallest and largest number among 3 numbers: My code is as follows: If (x >= y) largest = x Smallest = y Else largest = y Smallest =x If (z >= largest) Largest = z If (z <= smallest) Smallest = z Do you think this is correct? or are there better ways to solve this? 回答1: Let's say you've got arbitrary numbers x, y, z . Pseudocode: largest = x smallest = x if (y > largest) then largest = y if (z > largest) then largest = z if (y < smallest) then

问题 I am creating a pseudocode in determining the smallest and largest number among 3 numbers: My code is as follows: If (x >= y) largest = x Smallest = y Else largest = y Smallest =x If (z >= largest) Largest = z If (z <= smallest) Smallest = z Do you think this is correct? or are there better ways to solve this? 回答1: Let's say you've got arbitrary numbers x, y, z . Pseudocode: largest = x smallest = x if (y > largest) then largest = y if (z > largest) then largest = z if (y < smallest) then

问题 I am asked to develop a software which should be able to create Flow chart/ Control Flow of the input Java source code. So I started researching on it and arrived at following solutions: To create flow chart/control flow I have to recognize controlling statements and function calls made in the given source code Now I have two ways of recognizing: Parse the Source code by writing my own grammars (A complex solution I think). I am thinking to use Antlr for this. Read input source code files as

问题 I want to show 'View All' kind of link, only when the lines in the div has reached 4 lines. HTML <div> 3PAS-Pub-IO-doubleclick.net-LI, ATOM_DFP_Pub_LI, AUG12_Zynga.com_MafiaWars2_0.10$_CPM, ATOM_Macro_Jivox Testing, Sep 11 Head and Shoulder Innovation - Do Not Bill, 123Greetings - IN Do Not Pay_Second, July 11_Affinity.com_Fiat Linea_CPL 55, 3PAS-Pub-IO-atdmt.com-LI, 2_Affinity_RealEstate_CPC_2.8_INR_2nd, AUG12_Zynga.com_treasureIsle_0.10$_CPM, AUG12_Zynga.com_theville_0.10$_CPM, 123Greetings

问题 I want to show 'View All' kind of link, only when the lines in the div has reached 4 lines. HTML <div> 3PAS-Pub-IO-doubleclick.net-LI, ATOM_DFP_Pub_LI, AUG12_Zynga.com_MafiaWars2_0.10$_CPM, ATOM_Macro_Jivox Testing, Sep 11 Head and Shoulder Innovation - Do Not Bill, 123Greetings - IN Do Not Pay_Second, July 11_Affinity.com_Fiat Linea_CPL 55, 3PAS-Pub-IO-atdmt.com-LI, 2_Affinity_RealEstate_CPC_2.8_INR_2nd, AUG12_Zynga.com_treasureIsle_0.10$_CPM, AUG12_Zynga.com_theville_0.10$_CPM, 123Greetings

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: What's the best way to implement an 'enum' in Python? I’m writing a function that, ideally, I’d like to return one of three states: “yes”, “no”, and “don’t know”. Do any programming languages have a type that has three, and only three states? Like a boolean, but with three states instead of two? In languages that don’t have such a type (like Python), what’s the best type to represent this? Currently I think I’ll

问题 What is meant by "logical purity" (in the context of Prolog programming)? The logical-purity tag info says "programs using only Horn clauses" , but then, how would predicates like if_/3 qualify, using as much as it does the cut, and the various meta-logical (what's the proper terminology? var/1 and such) predicates, i.e. the low-level stuff. I get it that it achieves some "pure" effect, but what does this mean, precisely? For a more concrete illustration, please explain how does if_/3 qualify

问题 What is meant by "logical purity" (in the context of Prolog programming)? The logical-purity tag info says "programs using only Horn clauses" , but then, how would predicates like if_/3 qualify, using as much as it does the cut, and the various meta-logical (what's the proper terminology? var/1 and such) predicates, i.e. the low-level stuff. I get it that it achieves some "pure" effect, but what does this mean, precisely? For a more concrete illustration, please explain how does if_/3 qualify

问题 I come from a JavaScript/Ruby programming background and am used to this being how true/false works (in JS): !true // false !false // true Then you can use those true/false values with && like var a = true, b = false; a && !b; So and and not (and other logical/boolean operators) are part of a single system; it seems like the "logical" system and the "boolean" system are one and the same. However, in Coq, logics and booleans are two separate things. Why is this? The quote/link below

问题 What is the simplest way to do a three-way exclusive OR? In other words, I have three values, and I want a statement that evaluates to true IFF only one of the three values is true. So far, this is what I've come up with: ((a ^ b) && (a ^ c) && !(b && c)) || ((b ^ a) && (b ^ c) && !(a && c)) || ((c ^ a) && (c ^ b) && !(a && b)) Is there something simpler to do the same thing? Here's the proof that the above accomplishes the task: a = true; b = true; c = true ((a ^ b) && (a ^ c) && !(b && c))