sqrt.cpp

来自「本课程主要介绍面向对象程序设计的方法和c++语言的基本概念。以c++语言中的面向」· C++ 代码 · 共 17 行

// sqrt.cpp
// demonstrates sqrt() library function
#include <iostream>             //for cout, etc.
#include <cmath>                //for sqrt()
using namespace std;

int main()
   {
   double number, answer;       //sqrt() requires type double

   cout << "Enter a number: ";
   cin >> number;               //get the number
   answer = sqrt(number);       //find square root
   cout << "Square root is "
	<< answer << endl;           //display it
   return 0;
   }