POJ-1005

#include<iostream>#include<cmath>//#include<algorithm>using namespace std;#define PI 3.1415926/*return: years*/int recursionFunc(float rCurrent, float xYMin){float r;if(rCurrent==0){r=sqrt(100.0/PI);}else{r=sqrt(100.0/PI+pow(rCurrent,2));}if(r>xYMin){return 1;}else{return 1+recursionFunc(r, xYMin);}}int main(int argc, char *argv[]){int n;float x,y;float r;cin>>n;for(int i=0;i<n;i++){cin>>x>>y;r=sqrt(pow(x,2)+pow(y,2));cout<<"Property "<<i+1<<": This property will begin eroding in year "<<recursionFunc(0,r)<<"."<<endl;}cout<<"END OF OUTPUT."<<endl;return 0;}