allocate « Dimensional Array « C Array Q&A

1. How does C allocate data items in a multidimensional array?    stackoverflow.com

I'd like to find out how C will allocate a the data items of a multidimensional array, and if their allocation is consistent across machines. I know that, at the lowest level, ...

2. C Allocating Two Dimensional Arrays    stackoverflow.com

I am trying to allocate a 2D dimension array of File Descriptors... So I would need something like this fd[0][0] fd[0][1] I have coded so far: ...

3. How can i allocate a 2D array using double pointers?    stackoverflow.com

I want to know how can I form a 2D array using double pointers? Suppose my array declaration is:

char array[100][100];

4. allocate double dimension array in C    bytes.com

swesoc wrote: [color=blue] > How do i allocate menory for a double dimension array in 'C' for > example for char **var[/color] If you really want C, you are off topic in this group. If you meant C++, consider using std::vector< std::string > instead of char** and std::vector< std::vector< T > > instread of T**. This will take care of memory ...

5. allocating multidimensional array    cboard.cprogramming.com

6. Allocate space for 2d array    cboard.cprogramming.com

Allocate space for 2d array I'm having problems allocating space for a 2d array. Since I don't know precisely where the problem is, I've posted the exact content of the function I'm working with as well as the file that it references. Basically what happens is that I'm always ending up with junk values in my array. I figure it's either ...

7. 2D array allocation    cboard.cprogramming.com

8. passing dynamicaly allocated 2d arrays    cboard.cprogramming.com

Code: #include #include void read_data(unsigned int rows, const unsigned int cols, double **data) { ; } int main(void) { double **data; /* 2d array to hold input file values */ const unsigned long ncols=29; /* number of columns to read */ unsigned long nrows=0; /* number of rows in input file */ unsigned i; /* allocate data array */ ...

9. 4-dimensional array contiguous allocation    cboard.cprogramming.com

#include #include int main(void) { int w = 5, x = 7, y = 10, z = 8; int ****array; int i, j, k; array = malloc(sizeof(double ***) * w); for(i = 0;i < w;++i) { array[i] = malloc(sizeof(double **) * x); for(j = 0;j < x;++j) { array[i][j] = malloc(sizeof(double *) * y); for(k = 0;k < y;++k) ...

10. 2-dimensional array allocation    forums.devshed.com

I'm a new C programmer, who's stuck at the following point: I'm trying to create a two-dimensional array, r[i][d], that indexes the D degrees of freedom of N particles in space. I have the following code that I believe properly defines this two-dimensional array...but I could be wrong: double **r = (double **)malloc(N*sizeof(double)); for (int j=0;j

11. 4-dimensional array contiguous allocation    forums.devshed.com

Mallocing for pointers gives you a place to save pointers, not a place to save data. To get your contiguous memory, just malloc for size of dimension one times size of dimension two * size of dimensions three...... ad infinitum. Pointers are a separate issue. You will see examples where people malloc repeatedly for however many rows they need. This gives ...

12. 2D/ 3D array allocation with new & Templates    forums.devshed.com

13. allocating 2d array    daniweb.com

#include #include BOOL AllocateMemory(int ***iArray,int rows,int cols) { *iArray = (int**)calloc(rows,sizeof(int)); if(!*iArray) return false; for(int i =0;i < cols;i++) { **iArray = (int*)calloc(cols,sizeof(int)); if(!**iArray) return false; } return true; } void FreeAllocated(int **iArray,int rows,int cols) { for(int i = 0; i < rows;i++) { for(int x = 0;x < cols;x++) free(*iArray); free(iArray); } return; } void ShowArr(int **iArray,int rows,int ...

14. 2D array allocation problem    daniweb.com

#include #include int main( void ) { int rows, cols; int i, j; /*int * mat1Blok;*/ int ** mat1; printf("Enter number of rows: "); scanf("%d", &rows); printf("Enter number of columns: "); scanf("%d", &cols); /*memory allocation*/ /* mat1Blok = malloc(rows * cols * sizeof(int)); mat1 = malloc(rows * sizeof(int*)); for (i = 0; i < rows; ++i) { mat1[i] = ...

15. Two-Dimensional array allocation    tek-tips.com