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49 lines
1007 B
49 lines
1007 B
package class033;
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public class Code03_ZigZagPrintMatrix {
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public static void printMatrixZigZag(int[][] m) {
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// (a,b) A 先往右，再往下
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int a = 0;
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int b = 0;
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// (c,d) B 先往下，在往右
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int c = 0;
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int d = 0;
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int er = m.length - 1;
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int ec = m[0].length - 1;
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boolean fromUp = false;
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while (a != er + 1) {
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printLevel(m, a, b, c, d, fromUp);
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// A 先往右，再往下
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a = b == ec ? a + 1 : a;
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b = b == ec ? b : b + 1;
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// B 先往下，在往右
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d = c == er ? d + 1 : d;
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c = c == er ? c : c + 1;
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fromUp = !fromUp;
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}
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}
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public static void printLevel(int[][] m, int a, int b, int c, int d, boolean f) {
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if (f) {
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while (a != c + 1) {
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System.out.print(m[a++][b--] + " ");
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}
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} else {
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while (c != a - 1) {
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System.out.print(m[c--][d++] + " ");
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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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