C ++ 17では、Fortran 90以降、Fortranにあった通常の多次元配列はまだありません。

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double a[n][n] std::array<std::array<double, n>, n> , . . (n) runtime. new double[n][n] ( , new, runtime-). :

double **a = new double *[n]; //   n   double
for (int i = 0; i != n; ++i)
  {
    a[i] = new double[n];
  }

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UPD 2016-12-11 0:00. . , .

:

double *a = new double[n * n];

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:

REAL, ALLOCATABLE :: A (:,:)
...
ALLOCATE (A (N,N))

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void f (int a[2])

:

void f (int a[])

:

void f (int *a)

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UPD 2016-12-10 14:03. selgjos, , C99 VLA - . , : double a[n][n] , . . . :

double (*a)[n] = malloc (n * n * sizeof (double));

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void f (int n, double a[n][n])

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UPD 2016-12-12 19:12. :

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UPD 2016-12-12 22:49. :

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