I think I Need a Houseboat
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题目连接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=1049
本题主要是要理解题意,以房子坐标与原点为半径,原点为圆心做一个圆,算出面积,之后将它除以五十,因为侵蚀速度是每年50平方英里,所以算出最大年限,同时要注意年限的取法,可以通过ceil()函数或者通过直接加一就可以实现。还要进行宏定义圆周率,有的题当中对圆周率要求不同。
代码:
#include<stdio.h>#include<math.h>#define PI 3.1415926int main(){ int N,i=1; scanf("%d",&N); while(N--) { int year; float x,y,s,r; scanf("%f%f",&x,&y); r=sqrt(x*x+y*y); s=PI*r*r/2.0; year=(int)s/50.0; printf("Property %d: ",i++); printf("This property will begin eroding in year %d.\n",year+1); } printf("END OF OUTPUT.\n"); return 0;}
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