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53 lines
1.2 KiB
53 lines
1.2 KiB
package class024;
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public class Code02_ZigZagPrintMatrix {
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public static void printMatrixZigZag(int[][] matrix) {
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// x -> (a,b) 先往右，再往下
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int a = 0;
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int b = 0;
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// y -> (c,d) 先往下，再往右
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int c = 0;
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int d = 0;
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// (endR, endC) 是最右下角的位置
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int endR = matrix.length - 1;
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int endC = matrix[0].length - 1;
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// fromUp = true 斜线打印方向应该从右上走到左下
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// fromUp = false 斜线打印方向应该从左下走到右上
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boolean fromUp = false;
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while (a != endR + 1) {
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// (a,b) (c,d) 方向
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printLevel(matrix, a, b, c, d, fromUp);
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a = b == endC ? a + 1 : a;
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b = b == endC ? b : b + 1;
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d = c == endR ? d + 1 : d;
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c = c == endR ? c : c + 1;
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fromUp = !fromUp;
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}
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System.out.println();
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}
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public static void printLevel(int[][] m, int aRow, int aCol, int bRow, int bCol, boolean f) {
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if (f) {
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while (aRow != bRow + 1) {
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System.out.print(m[aRow++][aCol--] + " ");
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}
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} else {
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while (bRow != aRow - 1) {
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System.out.print(m[bRow--][bCol++] + " ");
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}
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}
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}
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public static void main(String[] args) {
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int[][] matrix = {
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{ 1, 2, 3, 4 },
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{ 5, 6, 7, 8 },
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{ 9, 10, 11, 12 } };
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printMatrixZigZag(matrix);
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}
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}
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