※指標變數 >> 設「指標變數」>> operation of pointer
※ pointer constant:operate on array,陣列位置為唯讀,無法改變
1. 取址 to access address
(a) &array[i][j] , &array = &array[0][0]
(b) array + index ,一維
(c) *(array+i)+j ,二維
2. 取值 to access value
(a) array[i][j]
(b) *(&array[i]) ,一維、*(address)
(c) *(array+index) ,一維、*(address)
(d) *(*(array+i)+j) ,二維、*(address)