A.if(u>s) t=u;t=s; B.t=u; if(t ) t=s; C.if(u>s) t=s;else t=u; D.t=s; if(u ) t=u;
A.int a[2][2]={{1},{2}}; B.int a[][2]={1,2,3,4}; C.int a[2][2]={{1},2,3}; D.int a[2][]={{1,2},{3,4}};
A.0 B.4 C.-4 D.2