Loading Data into a vector of structs - c++

Question

I am trying to make a basic text editor and I'm having trouble loading the data in the struct using push_back.
Here is the struct
struct LineInfo
{
int lineNumber;
string text;
};
Here is the main program
vector<LineInfo> globalDocument;
int main()
{
cout << "COSC 120 line editing system now running." << endl << endl;
bool done = false;
while ( !done )
{
cout << "> ";
string inputBuffer;
getline( cin, inputBuffer );
int lineNumber;
splitLineNumberAndText( inputBuffer, lineNumber );
ptr.push_back( &lineNumber );
if ( lineNumber > 0 )
handleTextLine( inputBuffer, lineNumber );
else
done = handleSystemCommand( inputBuffer );
}
cout << endl << "COSC 120 line editing system has shut down. Bye." << endl;
return 0;
}
This receives a line number and text from input then splits it up into an int and a string and sends it to handleTextLine
Here is the function
void handleTextLine( const string& s, int lineNumber2 )
{
globalDocument.lineNumber.push_back(lineNumber2);
globalDocument.text.push_back(s);
}

Answer 1

vector<LineInfo> globalDocument is a vector of LineInfo structs, so you must push_back LineInfo objects into it:
void handleTextLine( const string& s, int lineNumber2) {
LineInfo li;
li.lineNumber = lineNumber2;
li.text = s;
globalDocument.push_back(li);
}
Or, using struct initialization syntax:
void handleTextLine( const string& s, int lineNumber2) {
LineInfo li = {lineNumber2, s};
globalDocument.push_back(li);
}
You can get even more compact insertion code if you declare a constructor for LineInfo:
struct LineInfo {
// Default constructor
LineInfo() : lineNumber(0) {}
// Constructor taking 2 arguments
LineInfo(int n, string s) : lineNumber(n), text(s) {}
int lineNumber;
string text;
};
void handleTextLine( const string& s, int lineNumber2) {
globalDocument.push_back(LineInfo(lineNumber2, s));
}