public class Array05 {
public static void main(String args[]){
int i,j,sum=0;
int num[][]={{30,35,26,32},{33,34,30,29}};
for(i=0;i<num.length;i++){
System.out.print("第"+(i+1)+"个人的成绩为:");
for(j=0;j<num[i].length;j++){
System.out.print(num[i][j]+" ");
sum+=num[i][j];
}
System.out.println();
}
System.out.print("总成绩是"+sum+"分!");
}
}
两次for循环中num.length和num[i].length分别是什么,是引用吗