>>182 public class Ve { private double x, y, z; public Ve(double x, double y, double z) { this.x = x; this.y = y; this.z = z; } public Ve 和(Ve v) { return new Ve(x + v.x, y + v.y, z + v.z); } public double 内積(Ve v) { return x * v.x + y * v.y + z * v.z; } public String toString() { return "(" + x + ", " + y + ", " + z + ")"; } public static void main(String[] args) { double x = 1, y = 2, z = 3, a = 4, b = 5, c = 6; Ve α = new Ve(x, y, z); Ve β = new Ve(a, b, c); System.out.println("α＋β＝" + α.和(β)); System.out.println("(α、β)＝" + α.内積(β)); } }
