numbers

问题 I am trying to find a slightly more elegant solution to find if a sequence of numbers is in order. This is for a web form, and I am giving the user a chance to number items and that will set up the order. I know the maximum number of items, and it should always start at one. Right now (I know it is not correct) I test to make sure all the numbers are different and add up to what it should (e.g. for three items I test it adds to 6). Does anyone have a better/more accurate (since it is possible

问题 i am learning IEEE-754 representation of numbers. I know how to convert from binary to IEEE and on vice versa. Now i am trying to figure out how to find out how many numbers in single precision are for instance between 2 and 3. So, the sign will be the same for both. Fraction will be a combination i think and exponent is dependent from a proper number(because of shifts). WHat would be a clever way to do it right ? I would be grateful for any help. 回答1: Using a handy online IEEE-754 conversion

问题 I'm working on a programming project (mancala) and have gotten stuck when writing an array. I need to write an array that fills all board bins with the value of four, and then resets two bins to 0. So far I only have { int i; int beadArray[MAX] = {4}; for (i = 0; i < MAX; i++) { beadArray[i] = -1; } for (i = 0; i < MAX; i++) { cout<<i<<"\t"; } 回答1: int beadArray[MAX] = {4}; This line initializes the first element to 4, and the rest to 0, not all of them to 4. Something using vectors would be

问题 How to search for the biggest number, in a set of integers (cat1, cat2, cat3, cat4) I code this, contemplating every alternative, except for the == alternatives (longer code!!) Is there a more efficient, or simpler way to do it, than making an IF satement for every possible solution? If the number of numbers is bigger? (e.g. 10!!!!) Thanks. This is my code if (cat1 > cat2 && cat1> cat3 && cat1>cat4) printf("cat 1 is the biggest", cat1); if (cat2 > cat1 && cat2> cat3 && cat2>cat4) printf("cat

问题 console.log(2E-12); // returns 2E-12 console.log(2E12); // returns 2000000000000 Why does line one return 2E-12 and not the same as line two. Is this an illegal way of using the exponent? 回答1: From the ECMAScript specification of toString applied to the Number type: 7. If 0 < n ≤ 21, return the String consisting of the most significant n digits of the decimal representation of s, followed by a decimal point ‘.’, followed by the remaining k−n digits of the decimal representation of s. 8. If −6

问题 I am programming in java and I have come across a problem I could use some help with. Basically I need the user to enter how many times they expect a certain event to happen in a certain amount of times. The event takes a certain amount of time to complete as well. With all that said I need to use a random number generator to decide whether or not the event should happen based on the expected value. Here's an example. Say the event takes 2 seconds to complete. The user says they want 100

问题 Is it possible to style the default HTML5 input type="number" to look something like this: Or do I have to use additional elements for the 'arrows'? Couldn't find the CSS selectors for them. JsFiddle HTML: <input class="qnt amount" name="qnt" min="1" max="100" type="number" value="1"> CSS: input{ display:block; margin-top:12px; text-align:center; width:125px; height:30px; outline:1px solid black; border:none; } 回答1: You can't. Form fields are drawn by the underliyng chrome (meaning browser/OS

问题 I have a number that's 27 digits long, I need to format for readability purposes as below : Input : 999967799857791961574987365 Expected output : 999-9677-9985-7791-9615-7498-7365 So in words, Starting from the right most, I need to insert a '-' after every 4 digits . I have been using <xsl:value-of select="format-number($ID, '###-####-####-####-####-####-####-####')" /> but it doesn't work at all. Any help or pointers would be great..Cheers 回答1: The reason you can't just pass in the format

问题 I am a mathematics student and was given a proof detailed in this link. Out of curiosity I tried setting that up in a an Excel table with columns as N and rows as K, so that: =COMBIN(R$6,$B16)-COMBIN(R$6-1,$B16)-COMBIN(R$6-1,$B16-1) should equal 0 . For the most part it does but sometimes I get odd results. For example: =COMBIN(110,35)-COMBIN(110-1,35)-COMBIN(110-1,35-1)=0 and =COMBIN(110,45)-COMBIN(110-1,45)-COMBIN(110-1,45-1)=0 but =COMBIN(110,40)-COMBIN(110-1,40)-COMBIN(110-1,40-1)

问题 I am trying to read some negative values from a compressed file that has the hex values: FFFFFFFF, which should be -1, but displays as 4294967295 FFFFFFFE, which should be -2, but displays as 4294967294 I know FF should be the marker for - but is there a method in python that can just read the values directly or do I have to make my own method? Thank you! Edit: This is for Python 2.6. My program reads from binary data and I am just displaying it in hex to make it simpler. The program simply