[問題] 關於"運算子overloading"的問題

看板C_and_CPP作者luckychild (兌現承諾)時間15年前 (2010/05/10 10:38)推噓3(3推 0噓 15→)

留言18則, 4人參與討論串1/1

定義了一些運算子多載, 使用的時候發現2個問題, 其一是我的程式不允許我使用"連續技", Ex: (A+B)/C 類似的用法其二就直接請大家幫我看看程式碼了,以下函式出了錯? double distance(Point p1, Point p2) #include <iostream> #include <cstdlib> #include <cmath> using namespace std; struct Point {double x,y,z;}; struct Vector {double x, y, z;}; double distance(Point p1, Point p2) { return sqrt((p2.x-p1.x)*(p2.x-p1.x) + (p2.y-p1.y)*(p2.y-p1.y) + (p2.z-p1.z)*(p2.z-p1.z)); } Vector operator*(Vector &v, double n) { Vector u = {v.x*n, v.y*n, v.z*n}; return u; } Vector operator+(Vector &v1, Vector &v2) { Vector v={(v1.x + v2.x), (v1.y + v2.y), (v1.z + v2.z) }; return v; } Vector operator/(Vector &v, double n) { Vector u = {v.x/n, v.y/n, v.z/n}; return u; } Vector operator+(Point &p, Vector &v) { Vector u = {p.x + v.x, p.y + v.y, p.z + v.z}; return u; } Vector operator-(Point &p1, Vector &v1) { Vector v={p1.x-v1.x, p1.y-v1.y, p1.z-v1.z}; return v; } int main() { // Test1 Point i = {9, 9, 9}; Point j = {-1, -1, -1}; double a = distance(i,j); // 出錯了 // Test2 Vector b = {2,2,2}; Vector d = b/2; Vector e = (b/2) + b; // 出錯了 Vector f = d + b; // Test3 Vector A = {1,1,1}; Vector B = {2,2,2}; Vector C = (A+B) -B; // 出錯了 // Test4 Vector D = i+A; system("pause"); return 0; } -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.120.11.63

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luckychild

05/10 10:41, , 1^F

05/10 10:41, 1^F

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VictorTom

05/10 11:03, , 2^F

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VictorTom

05/10 11:03, , 3^F

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