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#pragma hdrstop
#pragma argsused
#include <iostream.h>
#include <math.h>
#include <string.h>
#include <fstream>
using namespace std;
ios::out;
ios::app;
double Distance(double, double, double, double);
class Place{
public:
char name[20], name1[20];
float Latitude;
float Longitude;
};
int i1 = 0, j1 = 0, k1 = 0, i = 0, j = 0, k = 0, m = 0, n = 0, v = 0, h = 0, a = 0, b = 0, c = 0, d = 0, e = 0, f = 0;
int main()
{
ofstream name("C:\Documents and Settings\05072295\My Documents\Borland Studio Projects\out.dat");
//ifstream name1("C:\Documents and Settings\05072295\My Documents\Borland Studio Projects\in.dat");
float C,F, Lat[2], Lon[2], TDistance;
char option, place1[20], place2[20];
Lat[0] = 0, Lat[1] = 0, Lon[0] = 0, Lon[1] = 0;
cout << "------**** Welcome to the World Distance Calculator ****------"<<endl<<endl;
cout << "This program enables you to calculate the distance between any"<<endl;
cout << "two cities in the world. Use the prompts below to navigate." << endl<<endl;
do{
cout << "If you would like to add a new entry >>>>>>>>>>>>>>>>>>>>>>>>>>>>> press 1"<<endl;
cout << "If you would like to find the distance between two places >>>>>>>> press 2"<<endl;
cout << "If you would like to display all the places in database >>>>>>>>>> press 3"<<endl;
cout << "If you wish to exit this program >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> press 4"<<endl<<endl;
cout << "Please enter an option number: ";
cin >> option;
cout << "" << endl;
switch (option)
{
case '1':
Place P1[10];
cout << "" << endl;
cout << "Enter Place Name: ";
cin >> P1[i++].name;
cout << "Enter Latitude Co-ordinate (in decimal degrees): ";
cin >> P1[j++].Latitude;
cout << "Enter Longitude Co-ordinate (in decimal degrees): ";
cin >> P1[k++].Longitude;
cout << "" << endl;
name << P1[i1++].name << P1[j1++].Latitude << P1[k1++].Longitude << endl;
// copy the out file into the in file
//strcpy(char P1.name, char*P1.name1);
break;
case '2':
cout << "" << endl;
cout << "Enter the The Name of the first place: ";
cin >> place1;
while ((e != 10)&&((place1[0] != P1[a].name[0])||(place1[1] != P1[b].name[1]))){
a++,b++,e++;
}
if (e > 9)
cout << "Place Not in Data Base!" << endl;
else
Lat[0] = P1[a].Latitude, Lon[0] = P1[b].Longitude ;
cout << " " << endl;
cout << "Enter the the name of the second place: ";
cin >> place2;
while ((f != 10)&&((place2[0] != P1[c].name[0])||(place2[1] != P1[d].name[1]))){
c++,d++,f++;
}
if (f > 9)
cout << "Place Not in Data Base!" << endl;
else
Lat[1] = P1[c].Latitude, Lon[1] = P1[d].Longitude;
cout << " " << endl;
TDistance = Distance(Lat[0],Lat[1],Lon[0],Lon[1]);
if (f > 9)
cout << "Distance could not be calculated";
else if (e > 9)
cout << "Distance could not be calculated";
else
cout << "Distance Between Place 1 And Place 2 is: " << TDistance << "Km";
cout << "" << endl;
cout << "" << endl;
while(e != 0 || a != 0 || b != 0){e--,a--,b--;}
while(f != 0 || c != 0 || d != 0){f--,c--,d--;}
break;
case '3':
cout << "Name Latitude Longitude";
cout << "" << endl;
if (i>0)
while (m < i){
cout << "" << endl;
//name >> P1[n++].name >>" " >> P1[v++].Latitude >> " " >> P1[h++].Longitude;
n--;
cout << P1[n++].name << endl ;
m++;}
else cout << "No Places Stored!";
while (m > 0){
m--,n--,v--,h--;}
cout << "" << endl;
cout << "" << endl;
break;
default:
cout << "" << endl;
cout << "Invalid option" << endl;
cout << "" << endl;
break;
}
}while (option !='4');
name.close();
}
double Distance(double L1, double L2, double Lon1, double Lon2)
{
double Lat1 = L1*(M_PI/180);
double Lat2 = L2*(M_PI/180);
double Long1 = Lon1*(M_PI/180);
double Long2 = Lon2*(M_PI/180);
return acos(sin(Lat1)*sin(Lat2)+cos(Lat1)*cos(Lat2)*cos(Long2-Long1))*6371;
} |
[debutant] Tableau avec indexation
Répondre avec citation
Là j'avoue je suis intrigué, c'est à la compile que ton fichier est effacé ? C'est pas plutôt lors de l'exécution de ton prog qui l'efface ?
(envisage peut etre l'utilisation d'un std::vector 
), j'ai horreur des "déclarations en rafales" (genre int i1,i2,i,j,k,m,n,v,h,a,b,c,d,e,f = 0
A méditer: La solution la plus simple est toujours la moins compliquée
)
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