C++(迭代法求平方根)

 1 #include <iostream>
 2 using namespace std;
 3 class square {
 4 public:
 5     square(float x, float y) {
 6         this->x = x;
 7         this->y = y;
 8     }
 9     void it_root() {
10         x = 0.5f*(x + y / x);
11     }
12     float getX() const { return x; }
13     float getY() const { return y; }
14 private:
15     float x, y;
16 };
17 
18 
19 
20 int main()
21 {
22     square root(1,3);
23     for (int i = 0; i < 5; ++i) {
24         root.it_root();
25     }
26     std::cout << root.getX() << endl;
27 
28     std::cout << "Hello World!\n";
29 }