经纬度计算距离的C++程序.doc

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1、#include#include#include#includeusingnamespacestd;intmain(){intNo[30];doublex[30],y[30];constdoublePI=3.;ifstreamin("/Users/ligao/Desktop/long.txt");ofstreamout("/Users/ligao/Desktop/distances.txt",ios::binary

2、ios::out);if(!in){cout<<"Cann

3、otopen!";return1;}if(!out){cout<<"Cannotcreate!";return1;}while(in){for(inti=0;i<30;i++){in>>No[i]>>x[i]>>y[i];cout<

4、//关键部分d=*acos(1-(pow((sin((90-y[i])*PI/180)*cos(x[i]*PI/180)-sin((90-y[j])*PI/180)*cos(x[j]*PI/180)),2)+pow((sin((90-y[i])*PI/180)*sin(x[i]*PI/180)-sin((90-y[j])*PI/180)*sin(x[j]*PI/180)),2)+pow((cos((90-y[i])*PI/180)-cos((90-y[j])*PI/180)),2))/2);cout<

5、6)<2000?"ttoolong":"tok")<2000?"ttoolong":"tok")<