dynamic-arrays

How to deal a deck of cards in c++

由 拟墨画扇 提交于 2019-12-08 02:34:28
问题 My requirements are as follows : int Deal(int,CardSet&,CardSet&) deals two hands into the two CardSet arguments passed. The number of cards to be placed into each hand is the first argument. The cards should be removed from the current set one at a time, placing the cards into alternate hands. For example. if the current set held 2S, 3S, 4S, 5S, 6S, 7S (the integers 0 to 5)and we had to deal 3 cards, then the two hands would get 2S, 4S, 6S (integers 0, 2, 4) and 3S, 5S, 7S (1, 3,5)

Debug Assertion Failed! Expression: _BLOCK_TYPE_IS_VALID(pHead->nBlockUse)

由 若如初见. 提交于 2019-12-08 00:57:50
问题 I know this problem is assessed many times on these forums, but they really are unique to their specific cases most times. This is a project for a class (on C++ no less), and the point of the project was to remake the classic board game Reversi. I have toiled through code for hours and finally made a program that will work, or so I thought! The big problem I am having seems to come from my deconstructor as it's giving me this error many of us have seen. My code is posted below and from my own

free a pointer to dynamic array in c

由 假装没事ソ 提交于 2019-12-07 08:37:18
问题 I create a dynamic array in c with malloc. e.g.: myCharArray = (char *) malloc(16); now if I make a function like this and pass myCharArray to it: reset(char * myCharArrayp) { free(myCharArrayp); } will that work, or will I somehow only free the copy of the pointer (myCharArrayp) and not the actual myCharArray? 回答1: That will be fine and free the memory as you expect. I'd consider writing a function like void reset(char** myPointer) { if (myPointer) { free(*myPointer); *myPointer = NULL; } }

Is a dynamic array automatically deallocated when it goes out of scope?

由 a 夏天 提交于 2019-12-06 17:19:31
问题 in this example procedure foobar; var tab:array of integer; begin setlength(tab,10); end; is the array destroyed or the memory is leaking? 回答1: The memory is freed. (That is, no memory leak!) 回答2: The array is automatically freed, but I've seen obscure cases where it isn't for some reason. I solved it by setting the array to nil. 来源： https://stackoverflow.com/questions/3113296/is-a-dynamic-array-automatically-deallocated-when-it-goes-out-of-scope

Debug Assertion Failed! Expression: _BLOCK_TYPE_IS_VALID(pHead->nBlockUse)

由 一曲冷凌霜 提交于 2019-12-06 13:18:21
I know this problem is assessed many times on these forums, but they really are unique to their specific cases most times. This is a project for a class (on C++ no less), and the point of the project was to remake the classic board game Reversi. I have toiled through code for hours and finally made a program that will work, or so I thought! The big problem I am having seems to come from my deconstructor as it's giving me this error many of us have seen. My code is posted below and from my own debugging code (using helpful cout messages) I have determined that the program manages to run to the

C program, pointer argument won't hold values

由 别说谁变了你拦得住时间么 提交于 2019-12-06 13:07:41
问题 Hi guys I'm sorry to bother you with this but I'm starting to loose it here.. I have recently started programming in C again and I have run into some kind bug that just I can't figure out.. My C program is(should be) an easy one, so it needs to do the following: An undefined number of natural elements is read form the keyboard until a 0 is read. After that it has to compute the product of all elements and compute the number of 0-s on the end of that result.. int input(int* v) { int n = 0; do

in Classic ASP, How to get if a dynamic array has elements inside?

由 我与影子孤独终老i 提交于 2019-12-06 07:26:31
问题 If I declare a dynamic sized array like this Dim myArray() Then how I can get in the code if this array is empty or it contains elements? I tried with IsArray(myArray) function that give me always True, otherwise if I try with UBound(myArray) function, I get an error. Any ideas? thanks in advance, Max 回答1: After declaring the array, you have to initialize it: Dim myArray() ReDim myArray(-1) Then such code will always work: If UBound(myArray)<0 Then 'array is empty.... Else 'array not empty...

How to add new element to dynamical array in Fortran90

由 送分小仙女□ 提交于 2019-12-06 06:10:28
[SOLVED] by francescalus . Working code for double precision dynamical arrays is: module DynamicalArrays contains subroutine AddToList(list, element) IMPLICIT NONE integer :: i, isize double precision, intent(in) :: element double precision, dimension(:), allocatable, intent(inout) :: list double precision, dimension(:), allocatable :: clist if(allocated(list)) then isize = size(list) allocate(clist(isize+1)) do i=1,isize clist(i) = list(i) end do clist(isize+1) = element deallocate(list) call move_alloc(clist, list) else allocate(list(1)) list(1) = element end if end subroutine AddToList end

free a pointer to dynamic array in c

由 北战南征 提交于 2019-12-05 15:03:45
I create a dynamic array in c with malloc. e.g.: myCharArray = (char *) malloc(16); now if I make a function like this and pass myCharArray to it: reset(char * myCharArrayp) { free(myCharArrayp); } will that work, or will I somehow only free the copy of the pointer (myCharArrayp) and not the actual myCharArray? That will be fine and free the memory as you expect. I'd consider writing a function like void reset(char** myPointer) { if (myPointer) { free(*myPointer); *myPointer = NULL; } } So that the pointer is set to NULL after being freed. Reusing previously freed pointers is a common source

Create a fixed size std::vector and write to the elements

由 北慕城南 提交于 2019-12-05 01:47:16
In C++ I wish to allocate a fixed-size (but size determined at runtime) std::vector then write to the elements in this vector. This is the code I am using: int b = 30; const std::vector<int> test(b); int &a = test[3]; However, this gives me a compiler (MSVC 2010 Pro) error: error C2440: 'initializing' : cannot convert from 'const int' to 'int &'. Conversion loses qualifiers. My understanding of const is that it makes all of the member variables of a class constant. For example, the following works fine: class myvec { public: myvec(int num) : ptr_m(new int[num]) {}; ~myvec() { delete ptr_m; }
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