Definition of one-dimensional array:
①: int a[];
a=new a[n];
②: int a[]=new int[n];
③: int a[]={1,2,3};
Definition of two-digit array:
①: int b[][];
b=new b[i][k];
②: int b[][]=new int[i][k];
③: int b[][]={{1,2},{2,3},{3,5}}; ——–>>int b[][]=new b[3][2];