Java 范围内的所有毕达哥拉斯三胞胎

如果我想找到特定范围内的所有毕达哥拉斯三胞胎，我编写了以下代码：

for (int a = 1; a < range; a++) {
        for (int b = 1; b < range; b++) {
            for (int c = 1; c < range; c++) {
                if (a * a + b * b == c * c) {
                    System.out.println(a + "," + b + "," + c);
                }
            }
        }
    }

for（int a=1；a

但不幸的是，我得到了重复的三胞胎，例如：3,4,5和4,3,5

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如何克服此问题？

您可以通过更改循环来删除重复项，尤其是在每个循环开始的地方：

for (int a = 1; a < range; a++) {
        for (int b = a + 1; b < range; b++) {
            for (int c = b + 1; c < range; c++) {
                if (a * a + b * b == c * c) {
                    System.out.println(a + "," + b + "," + c);
                }
            }
        }
    }

for (int a = 1; a < range; a++) {
        for (int b = a + 1; b < range; b++) {
            double c = Math.sqrt(a*a + b*b)
            if (c == int(c)) {
                System.out.println(a + "," + b + "," + c);
            }
        }
    }