(C) N x N Array of zeros-CodePudding

I am new to C and would like to create a N x N matrix of zeros (i.e., every element is zero). N is an integer.

Using MATLAB I managed to generate such an array using the code: Array = zeros(N);

However, in C, how would we generate such an array with minimal lines of code?

Thanks in advance.

CodePudding user response：

Just write

T matrix[N][N] = { 0 };

where T is some type specifier as for example int.

Such an initialization is allowed if N is an integer constant expression.

Otherwise you need to write

#include <string.h>

//...

T matrix[N][N];
memset( matrix, 0, sizeof( matrix ) );

CodePudding user response：

You can allocate the memory using the calloc function which usually allocates memory on the heap (which is good if N is large):

#include <stdlib.h>
//...
int(*dyn)[N] = calloc(N, sizeof *dyn);
// use dyn
free(dyn);