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#include <iostream>
#include <string>
#include <fstream>
using namespace std;
class myClass{
public:
myClass (string fname) //constructor
{
filename = fname;
selection = 0;
input = 0;
number = 0.0;
anothernumber = 0.0;
replacement = 0.0;
newfilename = "";
choice = "";
answer = "";
}
string returnNewfile()
{
return newfilename;
}
string returnAnswer()
{
return answer;
}
int returnSelection()
{
return selection;
}
int returnInput()
{
return input;
}
double returnOtherNumber()
{
return anothernumber;
}
double returnNumber()
{
return number;
}
double returnReplace()
{
return replacement;
}
string returnChoice() //choice
{
return choice;
}
void Select()
{
cout << "Please enter 0 for read or 1 for write mode" << endl;
while (!(cin >> selection) || selection < 0)
{
cout << "Value is invalid, try again." << endl;
cin.clear(); //Clear error flag
cin.ignore();
} // end while
if (selection == 0)
{
ifstream filename ("example.txt");
if (filename.is_open())
{
while(getline(filename, line)) //Goes through the file and gets each line individually
{ //and prints out whats in it line by line.
cout << '\n' <<"This is what is in the file: " << line << endl;
}
filename.close();
}
}
else if (selection == 1)
{
fstream filename("example.txt");
if (filename.is_open())
{
cout << "How many numbers do you want to enter? " << endl;
while (!(cin >> input) || input < 0)
{
cout << "Value is invalid, try again." << endl;
cin.clear(); //Clear error flag
cin.ignore();
} // end while
for (int i = 1; i <= input; i++) //This will check how many numbers you want to enter
{ //then will keep asking for the numbers until it reaches what you wanted.
cout << '\n' << "This is what is in the file: " << line << endl;
cout << '\n' << "Hit a to accept value, r to replace, d to delete it, or type x to accept rest of the values. " << endl;
while (!(cin >> choice))
{
cout << "Value is invalid, try again." << endl;
cin.clear(); //Clear error flag
cin.ignore();
} // end while
if (choice == "a" || choice == "A")
{
filename << line << endl;
}
if (choice == "r" || choice == "R")
{
cout << "What number do you want to replace it with? " << endl;
while (!(cin >> number) || number < 0)
{
cout << "Value is invalid, try again." << endl;
cin.clear(); //Clear error flag
cin.ignore();
} // end while
filename << number << " " << line << endl;
cout << "The number has been replaced." << endl;
}
if (choice == "d" || choice == "D")
{
number--;
cout << "Number deleted." << endl;
}
if (choice == "x" || choice == "X")
{
terminate();
}
cout <<'\n' << "Would you like to enter a new number? y or n" << endl;
cin >> answer;
if (answer == "y" || answer == "Y")
{
cout << '\n' << "Please enter the number." << endl;
while (!(cin >> anothernumber) || anothernumber < 0)
{
cout << "Value is invalid, try again." << endl;
cin.clear(); //Clear error flag
cin.ignore();
} // end while
filename << line << " ";
filename << anothernumber << endl;
}
}// end of for loop
cout << "Would you like to save the changes of the file to a new one?" << endl;
cin >> newfilename;
while (newfilename != "yes" || newfilename != "Yes" || newfilename != "YES" )
{
cout << "Value is invalid, try again." << endl;
cin.clear(); //Clear error flag
cin.ignore();
} // end while
if(newfilename == "yes" || newfilename == "Yes" || newfilename == "YES")
{
string thisfilenow;
cout << "Please enter new file name." << endl;
cin >> thisfilenow; //this will save the new data into another file leaving the old file intact.
filename << thisfilenow;
}
// while loop
}// end of filename.open if statement
filename.close();
}// end of else if selectio == 1
}//End of void select
private:
string filename;
string line;
string answer;
string newfilename;
int selection;
double myarray[10][10];
int input;
double number, replacement,anothernumber;
string choice;
};
int main()
{
string fname = "example.txt";
myClass co(fname);
co.Select();
}
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