for loop - C: Filling a matrix -

i'm trying fill matrix loop, i'm coming problem 2 coordinates x_0 , y_0 interchangeable. emphasize problem i've simplified downwards basic example:

i'm filling next 2x2 matrix , having print value @ 1,2 (or [0][1] within array):

int matrix[1][1];   for(j=0; j<2; j++){    for(i=0; i<2; ++i){         scanf("%d", &matrix[j][i]);    } }  printf("%d \n", matrix[0][1]);

however returns value entered third, or [1][0]. thought might have messed loop, printing matrix[1][0] returns same (although here appropriate value).

thank help

edit: added declaration.

it appears confisuing indexing allocation,

int matrix[1][1]

allocates 1×1 matrix, and

int matrix[2][2]

allocates 2×2 matrix matrix[1][1] actual m2,2 element of matrix, because index of first-row,first-column 0,0.

c for-loop matrix

Five