7-7 编程练习题答案
2014-06-21 15:00
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import java.util.Scanner; public class Test { public static void main(String[] args) { double[][] points = { {-1, 0, 3}, {-1, -1, -1}, {4, 1, 1}, {2, 0.5, 9}, {3.5, 2, -1}, {3, 1.5, 3}, {-1.5, 4, 2}, {5.5, 4, -0.5} }; double minestDistance = 999; int index1 = 0; int index2 = 0; for(int i = 0; i < points.length; i++) { for(int j = i + 1; j < points[i].length; j++) { if(minestDistance > distance(points[i][0], points[j][0], points[i][1], points[j][1], points[i][2], points[j][2])) { minestDistance = distance(points[i][0], points[j][0], points[i][1], points[j][1], points[i][2], points[j][2]); index1 = i; index2 = j; } } } System.out.println("The closest two points are (" + points[index1][0] + ", " + points[index1][1] + ", " + points[index1][2] + ") and (" + points[index2][0] + ", " + points[index2][1] + ", " + points[index2][2] + ")"); } public static double distance(double x1, double y1, double z1, double x2, double y2, double z2) { return Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1) + (z2 - z1) * (z2 - z1)); } }
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