私は周りを見回しましたが、本当に私を助けるものはまだ見つかりませんでした! 緯度と経度を使用して 2 つの都市間の距離を計算するプログラムを作成しました。都市の詳細はファイルに保存され、プログラムで BST に読み込まれます。これまでのところ、すべての都市で同じ答えが得られる距離を計算すると思われるコードを実行する場合を除いて、すべてが正常に機能します。すべての都市で同じ答えが得られる理由がよくわかりません! 私を正しい方向に向けるのを手伝ってください。
ここに距離を計算するためのコードがあります
#include <cmath>
#define pi 3.14159265358979323846
string userResponse;
float globalLat1, globalLon1, globalLat2, globalLon2;
for(int j= 0; j < 2; j++){
string whatever;
if (j==0){
bool hasbeenfound = false;
do{
//ask the user to enter their first city of their choice
whatever = "first ";
cout << "Enter your " + whatever + "City" << endl;
cout << "-------------------" << endl;
cin >> userResponse;
cout << endl;
if (Cities->search(userResponse)) //check if the entered city already exist
{
hasbeenfound = true;
}
else{
cout << "City not Found" << endl;
cout << endl;
}
//globalCity1 = Cities->sRootName;
globalLat1 = Cities->sLatitude;
globalLon1 = Cities->sLongitude;
}
while(hasbeenfound == false); //while the entered city hasn't been found, repeat the process
}else
{
bool hasbeenfound = false;
do{
//ask the user to enter their second city of their choice
whatever = "second ";
cout << endl;
cout << "Enter your " + whatever + "City" << endl;
cout << "-------------------" << endl;
cin >> userResponse;
cout << endl;
if (Cities->search(userResponse)) //check if the entered city already exist
{
hasbeenfound = true;
}
else{
cout << "City not Found" << endl;
}
//globalCity2 = Cities->sRootName;
globalLat2 = Cities->sLatitude;
globalLon2 = Cities->sLongitude;
}
while(hasbeenfound == false); //while the entered city hasn't been found, repeat the process
}
}
// This function converts decimal degrees to radians
double deg2rad(double deg) {
return (deg * pi / 180);
};
// This function converts radians to decimal degrees
double rad2deg(double rad) {
return (rad * 180 / pi);
};
//distance calculations
cout << endl;
distan = sin(globalLat1)) * sin(deg2rad(globalLat2)) + cos(deg2rad(globalLat1)) * cos(deg2rad(globalLat2)) * cos(globalLon2 - globalLon1);
distan = rad2deg(distan);
distan = distan * 60 * 1.1515;
distan = (6371 * pi * distan)/180;
cout << "The Distance between the to cities is: " << distan << " kilometers" << endl;
