数组B：我想我需要一艘船屋

标签：class   3.1   turn   within   com   put   ted   lang   ima   

Fred Mapper is considering purchasing some land in Louisiana to build his house on. In the process of investigating the land, he learned that the state of Louisiana is actually shrinking by 50 square miles each year, due to erosion caused by the Mississippi River. Since Fred is hoping to live in this house the rest of his life, he needs to know if his land is going to be lost to erosion.

After doing more research, Fred has learned that the land that is being lost forms a semicircle. This semicircle is part of a circle centered at (0,0), with the line that bisects the circle being the X axis. Locations below the X axis are in the water. The semicircle has an area of 0 at the beginning of year 1. (Semicircle illustrated in the Figure.)

Input

Output

Sample Input

2
1.0 1.0
25.0 0.0

Sample Output

Property 1: This property will begin eroding in year 1.
Property 2: This property will begin eroding in year 20.
END OF OUTPUT.

Hint

实验代码

#include<stdio.h>
#include<math.h>
#define pi 3.1415927
int main()
{
	int n,i=1;
	int year;
	double x,y,r,s;  //定义浮点型变量，x，y，半径，面积 
	scanf("%d",&n);
	while(n--)
	 {
	 	scanf("%lf%lf",&x,&y);
	 	r=x*x+y*y;      //求半径的平方 
	 	s=pi*r/2.0;  //求半圆的面积
		year=(int)ceil(s/50.0);  /*ceil函数：返回大于等于表达式的最小整数 
		例如：ceil(15.8)=16,ceil(-15.8)=-15*/ 
		printf("Property %d: This property will begin eroding in year %d.\n",i++,year);
	  }
	  printf("END OF OUTPUT.\n");
	  return 0;
}

数组B：我想我需要一艘船屋

标签：class   3.1   turn   within   com   put   ted   lang   ima   

原文地址：https://www.cnblogs.com/lqx0123/p/10247375.html