arrays

问题 This may be a dumb question but I don't understand why do I get this error : void func (int ** array) { } int main (void) { int array[5][5] = { }; func(array); } warning: passing argument 1 of 'func' from incompatible pointer type [-Wincompatible-pointer-types] func(array); ^~~~~ note: expected 'int **' but argument is of type 'int (*)[5]' void func (int ** array) { } ~~~~~~~^~~~~ 回答1: Consider a function void foo(int **p) . The p it is given contains some address. At that address, there is

问题 Assuming I have two arrays A and B (Both with equal number of elements) int A[] = {40,50,70}; int B[] = {80,60,45}; I have to rearrange array A in such a way that maximum number of elements in Array A are greater than their respective elements in array B. In this case, rearranging A as {40,70,50} would yield the required result. What would be the most optimal way of going this? 回答1: I would use something like: std::vector<int> f(std::vector<int> A, const std::vector<int>& B) { std::vector<std

问题 I have a String on the variable coords which has the value of a String array, but it is not an array (outcome of toString). String coords = "[[126,224],[255,232],[270,332],[106,444]]"; How can you create a String array from this String? An array doesn't have a #valueOf (as far as I know) and you can't easily split the characters. Edit: I am looking for a String array which contains the four Strings as their own entries. E.g. "126,224", "255,322".. 回答1: One of the easiest ways to achieve that

问题 This question already has answers here : Why can't we use double pointer to represent two dimensional arrays? (5 answers) usage of double pointers as arguments (4 answers) Closed 6 years ago . This is a sample code of my program. I have a function named function which is used to return an integer value and an integer array. I have to pass them as pointers (The signature of function cannot be changed). So I wrote the below code. Here I have to assign the values to the double pointer passed to

问题 I am extending Array from LibGDX in a generic fashion which extends Array<MyClass> but when I access its items array directly, I get an error that Object can not be cast to class MyClass . I don't see exactly why I'm getting an error with this. public class MyArray extends Array<MyClass> { public void method() { for (MyClass myItem : items)//throws java.lang.Object; cannot be cast to class error on this line System.out.println(myItem); } } I noticed also that if I try to do a similar thing

问题 This question already has answers here : How to return matrix (2D array) from function? (C) (3 answers) Closed 4 years ago . Maybe my question is easy but I am newby in C. I create a function which read some data from a file and then pass them to a another function which parse them given number of rows and columns and create a 2D array. I want to return this array in order to perform some operantions in its rows. How can I return a 2D array in C Can someone give me an example or what may I

问题 I would like to pull values from a PHP array at random, without pulling the same value twice before I've pulled all values from the entire array. In other words, if I have the array... _____ | foo | | bar | | baz | |_____| ...I want to pull a random value three times without pulling the same value twice, so I could have... 1st: foo foo bar bar baz baz 2nd: bar baz foo baz foo bar 3rd: baz bar baz foo bar foo ...on my three separate pulls. Now, I realize I could do this by simply removing the

问题 I have a list of strings along with conditions that determine how they should be sorted. The conditions can be simplified to the form, X before Y or X after Y . However, one (or more) of the conditions contradict the rest. Given a bunch of such conditions, I need to determine which conditions contradict the most other conditions so that I can eliminate the fewest conditions necessary to make them consistent with each other. Once this is done, I will be able to reverse-engineer the original

问题 I have a list of strings along with conditions that determine how they should be sorted. The conditions can be simplified to the form, X before Y or X after Y . However, one (or more) of the conditions contradict the rest. Given a bunch of such conditions, I need to determine which conditions contradict the most other conditions so that I can eliminate the fewest conditions necessary to make them consistent with each other. Once this is done, I will be able to reverse-engineer the original

问题 hey guys, i think i lost my mind. print_r($location); lists some geodata. array ( 'geoplugin_city' => 'My City', 'geoplugin_region' => 'My Region', 'geoplugin_areaCode' => '0', 'geoplugin_dmaCode' => '0', 'geoplugin_countryCode' => 'XY', 'geopl ... when I iterate through it with a foreach loop I can print each line. However shouldn't it be possible to just get a specific value out of the array? like print $location[g4]; should print the countryCode shouldn't it? Thank you! 回答1: echo $location