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Textfile.cpp
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Textfile.cpp
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#include <iostream>
#include <string>
#include <fstream>
using namespace std;
class Textfile {
public:
Textfile() {
cout << "default constructor" << endl;
}
Textfile(string name) {
Textfile(); // call the default constructor
cout << "constructor with 1 parameter" << endl;
setFilename(name);
}
void setFilename(string name) {
filename = name;
}
void details() {
cout << "Filename: " << filename << endl;
}
void readFileContents() {
ifstream olaf(filename);
string str;
int count = 0;
while(getline(olaf, str)) {
count++;
}
olaf.close();
numberOfLines = count;
lines = new string[numberOfLines];
// open the file again
olaf.open(filename);
int i = 0;
while(getline(olaf, str)) {
lines[ i ] = string(str);
i++;
}
}
string lineAt(int i) {
return lines[ i ];
}
~Textfile() {
if(NULL != lines) {
delete[] lines;
}
}
private:
string *lines = NULL;
string filename;
int numberOfLines = 0;
};
int main( int argc, char** argv )
{
Textfile a;
a.setFilename( "LICENSE" );
a.details();
a.readFileContents();
cout << "Next, output lines 4 to 7"<< endl;
for( int i = 4; i < 8; i++ ) {
cout << a.lineAt(i) << endl;
}
cout <<"Done with lines 4 to 7"<< endl;
cout << endl;
Textfile *other = new Textfile("LICENSE");
(*other).details();
other->details();
}