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  • 打印乘法口诀表四个方向

    for (int i = 9; i >= 1; i--) {
      for (int k = i - 1; k > 0; k--) {
        System.out.print(" ");
      }
      for (int j = 9; j >= i; j--) {
        System.out.print(i + "*" + j + "=" + i * j + " ");
      }
      System.out.println();
    }
    System.out.println("********************************************************************");
    for (int i = 1; i <= 9; i++) {
      for (int k = i - 1; k > 0; k--) {
        System.out.print(" ");
      }
      for (int j = 9; j >= i; j--) {
        System.out.print(i + "*" + j + "=" + i * j + " ");
      }
      System.out.println();
    }
    for (int i = 1; i < 10; i++) {
      for (int j = 1; j <= i; j++) {
        System.out.print(i + "*" + j + "=" + i * j + " ");
      }
      System.out.println("");
    }
    System.out.println("********************************************************************");
    for (int i = 9; i > 0; i--) {
      for (int j = 1; j <= i; j++) {
        System.out.print(i + "*" + j + "=" + i * j + " ");
      }
      System.out.println();
    }

    (其他)与第一个方向的三角九九乘法表,数据相反

    for (int i = 1; i <= 9; i++) {
      for (int j = 9; j > 0; j--)
        if (j <= i) {
          for (int m = 1; m <= j; m++) {
            System.out.print(m + "*" + j + "=" + m * j + " ");
          }
          break;
        } else {
          System.out.print(" ");
      }
      System.out.println();
    }
    System.out.println("********************************************************************");
    for (int i = 9; i >= 1; i--) {
      for (int j = 9; j > 0; j--)
        if (j <= i) {
          for (int m = 1; m <= j; m++) {
            System.out.print(m + "*" + j + "=" + m * j + " ");
          }
          break;
        } else {
          System.out.print(" ");
        }
        System.out.println();
    }

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  • 原文地址:https://www.cnblogs.com/bd195746/p/5813842.html
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