??:
?????? 2?? ??? ?????.
(?? ????: Java ????)
??? ??? ?? ?????:
public class 順時針輸出二維矩陣 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
int[][]arr={
{1,2,2,3},
{4,5,4,6},
{7,8,6,9},
{1,2,3,4}
};
int k=0;
for(int i = 0; i < arr.length;i++){
for(int j = 0;j < arr[0].length;j++){
k++;
System.out.print(arr[i][j]+" ");
if(k % 4 == 0){
System.out.println("");
}
}
}
System.out.println("");
System.out.println(arr[0].length);//列數(shù)
System.out.println(arr.length);//行數(shù)
print(arr);
}
static void print (int[][]arr){
int leftUpRow = 0;//最左行
int leftUpCol = 0;//最左列
int rightDownRow = arr.length-1;//最右列
int rightDownCol = arr[0].length-1;//最右列
while(leftUpRow <= rightDownRow && leftUpCol <= rightDownCol){
int row = leftUpRow, col = leftUpCol;
//矩陣的第一行，此時行不變，列++
while(col <= rightDownCol){
System.out.print(arr[row][col++]+" ");
}
//矩陣右邊第一列 此時行++，列不變
//將 col，row 恢復(fù)
col = rightDownCol;
row++;
while(row <= rightDownRow){
System.out.print(arr[row++][col]+" ");
}
//矩陣的最下面一行 此時 行不變 列--
//還需要恢復(fù) col row 的值
row = rightDownRow;
col--;
while(col >= leftUpCol){
System.out.print(arr[row][col--]+" ");
}
//矩陣最左邊一列，此時行--，列不變
//繼續(xù)恢復(fù) col row的值
col = leftUpCol;
row--;
while(row > leftUpRow){
System.out.print(arr[row--][col]+" ");
}
leftUpRow++;
leftUpCol++;
rightDownRow--;
rightDownCol--;
}
}
}?? ??:
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