In C since C99, even dynamic multidimensional arrays can be easily allocated in one go with malloc
and freed with free
:
double (*A)[n] = malloc(sizeof(double[n][n]));
for (size_t i = 0; i < n; ++i)
for (size_t j = 0; j < n; ++j)
A[i][j] = someinvolvedfunction(i, j);
free(A);