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#include <iostream>
#include <fstream>
using namespace std;
class Distance
{
private:
int feet;
float inches;
public:
Distance() : feet(0), inches(0.0)
{}
Distance(int ft, float in) : feet(ft), inches(in)
{}
~Distance()
{}
void getdist()
{
cout << "\nEnter feet: ";
cin >> feet;
cout << "Enter inches: ";
cin >> inches;
}
void showdist()
{
cout << feet << "\'-" << inches << "\"";
}
void add_dist(Distance, Distance);
};
void Distance::add_dist(Distance d2, Distance d3)
{
inches = d2.inches + d3.inches;
feet = 0;
if ( inches > 12.0 ) {
inches -= 12.0;
feet++;
}
feet += d2.feet + d3.feet;
}
int main()
{
const int SZ = 100;
Distance* ptrd[SZ];
Distance* ptr_df[SZ];
int dist_obj = 0;
char answer = 'e';
int n = 0;
fstream dist_file;
cout << "Distance Program v0.0.1";
cout << "\nEnter a to add distances.";
cout << "\nEnter d to display file.";
cout << "\nEnter h for help.";
cout << "\nEnter p to print distances.";
cout << "\nEnter s to save distances.";
cout << "\nEnter q to quit." << endl;
do {
cout << "\nEnter command (a,d,h,p,s,q): ";
cin.unsetf(ios::skipws);
cin >> answer;
cin.setf(ios::skipws);
if ( cin.good() ) {
cin.ignore(10, '\n');
switch (answer) {
case 'a':
while ( answer != 'n' ) {
cout << "\nEnter a new distance(y/n)?";
cin.unsetf(ios::skipws);
cin >> answer;
cin.setf(ios::skipws);
if ( cin.good() && answer == 'y' ) {
ptrd[dist_obj] = new Distance;
ptrd[dist_obj++]->getdist();
cin.ignore(10, '\n');
} else if ( cin.good() && answer == 'n' ) {
break;
} else {
cin.clear();
cout << "\nIncorrect input: enter y or n." << endl;
}
}
cin.ignore(10, '\n');
break;
case 'd':
dist_file.open("dist_file.dst", ios::in | ios::binary);
if ( !dist_file ) {
cout << "\nCan not open file dist_file.dst.";
break;
}
dist_file.seekg(0);
n = 0;
while ( !dist_file.eof() ) {
ptr_df[n] = new Distance;
dist_file.read( (char*)ptr_df[n], sizeof(Distance) ); /*Is this correct?*/
n++; //create some file...
}
dist_file.close();
cout << "\nRead " << n << " distances." << endl;
for ( int i = 0; i < n; i++ ) {
ptr_df[i]->showdist(); /*output produces garbage*/
cout << endl;
}
break;
case 'h':
cout << "\nEnter a to add distances.";
cout << "\nEnter d to display file.";
cout << "\nEnter h for help.";
cout << "\nEnter p to print distances.";
cout << "\nEnter s to save distances.";
cout << "\nEnter q to quit." << endl;
break;
case 'p':
if ( dist_obj == 0 ) {
cout << "\nNo distances added, try option a or d.";
} else {
for(int i=0; i < dist_obj; i++) {
ptrd[i]->showdist();
cout << endl;
}
}
break;
case 's':
if ( dist_obj == 0 ) {
cout << "\nNothing to save. Exiting command.";
} else {
dist_file.open("dist_file.dst", ios::app | ios::out | ios::binary);
if ( !dist_file ) {
cout << "\nCan not open file to write.";
break;
}
for (int i=0; i < dist_obj; i++)
dist_file.write((char*)(ptrd[i]), sizeof(Distance));
dist_file.close();
cout << "\nFile saved.";
}
break;
case 'q':
break;
default:
cout << "\nEnter a, d, p, s or q please.";
break;
}
} else {
cin.clear();
cout << "\nIncorrect input: enter a, d, p, s or q please." << endl;
}
} while ( answer != 'q');
return 0;
}
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