Hi Everybody,
I have succeeded in parsing the values I needed from a text file and storing them in an array. The script I've posted works as a function, but now I tried to put it in a class and I can't figure out how to define the constructor. The problem is that in the main, I get the name of the file via CIN:
cin.getline(input,20);Could somebody explain me how to define the constructor for this example in a correct way?
Thanks in advance,
Kev
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#include <fstream>
#include <string.h>
class X {
private:
fstream text;
string line;
public:
X( const std::string& InputFile){
text.open(InputFile.c_str());
}
double** Extract_Data(){
const int x = 2;
const int f = 3;
const int k = 0;
// if (condition) statement
// the statement will only be executed if the condition is true
if (text.fail())
{
cout << "File not found: " << InputFile <<endl;
return 0;
}
// to check wether the file is correctly opened we include bool is_open(text)
// this will return a bool of type true if the file is correctly opened, else false
if(! text.is_open())
{ cout << "Error opening file"; exit (1);}
// Exit one tells Operating System to exit the programm
if (text.is_open())
{
while(! text.eof() ) //(getline(text,line) )
{
if (x == 2)
{
while ((x==2) && (! text.eof()) )
{
getline(text,line);
std::string::size_type pos_2 = line.find("R_CMD");
if((pos_2 == 0) && (pos_2 != std::string::npos) )
{
std::string word = line.substr(pos_2);
std::string::size_type pos_true = line.find("True");
if(pos_true < 20)
{
x = 8;
break;
}
}
}
}
else if (x == 8)
{
while ( (x==8) && (! text.eof()))
{
getline (text,line,'>');
std::string::size_type pos_81 = line.find("TIME_");
std::string::size_type pos_82 = line.find("DELT_");
std::string::size_type pos_83 = line.find("SELECTED_");
std::string::size_type pos_81b = line.find("ATG");
std::string::size_type pos_84 = line.find("LT_");
std::string::size_type pos_85 = line.find("LN_");
std::string::size_type pos_86 = line.find("G_X_");
std::string::size_type pos_87 = line.find("G_Y_");
std::string::size_type pos_88 = line.find("G_Z_");
std::string::size_type pos_89 = line.find("C_X_");
std::string::size_type pos_810 = line.find("C_Y_");
std::string::size_type pos_811 = line.find("C_Z_");
std::string::size_type pos_812 = line.find("P_");
std::string::size_type pos_813 = line.find("R_");
std::string::size_type pos_814 = line.find("P_Z_");
std::string::size_type pos_815 = line.find("TU_HI_");
std::string::size_type pos_816 = line.find("TU_R_");
std::string::size_type pos_819 = line.find("SY_T_");
std::string::size_type pos_8 = line.find("ST_N_");
int positie [19] = {pos_81,pos_82,pos_83,pos_81b,pos_84,pos_85,pos_86,pos_87,pos_88,pos_89,pos_810,pos_811,pos_812,pos_813,pos_814,pos_815,pos_816,pos_819,pos_8};
if(positie[0]!= std::string::npos){
std::string::size_type pos_ = line.find("<");
std::string begin = line.substr(pos_ +1);
cout<<begin<<"\n";
}
else if(positie[3] != std::string::npos){
f=1;
}
if(f == 1){
for(int v=1;v<3;v++){
if(positie[v]!= std::string::npos){
std::string::size_type pos_ = line.find("<");
std::string begin = line.substr(pos_ +1);
cout<<begin<<"\n";
}
}
if(positie[4] != std::string::npos){
std::string::size_type pos_ = line.find("<");
std::string begin = line.substr(pos_ +1);
string s1 = begin.substr(2,2);
stringstream ss1(s1);
float degree = 0;
ss1>>degree;
string s2 = begin.substr(5,7);
stringstream ss2(s2);
float minute = 0;
ss2>>minute;
float latitude = 0;
latitude = degree + minute/60;
m[k][0] = latitude;
//myfile<<latitude<<endl;
}
if(positie[5] != std::string::npos){
std::string::size_type pos_ = line.find("<");
std::string begin = line.substr(pos_ +1);
//if(strcmp(c,E)==0){
string s1 = begin.substr(2,3);
stringstream ss1(s1);
float degree = 0;
ss1>>degree;
string s2 = begin.substr(6,7);
stringstream ss2(s2);
float minute = 0;
ss2>>minute;
float longitude = 0;
longitude = degree + minute/60;
m[k][1] = longitude;
}
for(int i=6; i<18; i++)
{
if((positie[i]!= std::string::npos) && (positie[i] != 5)) // Otherwise TGT_VEL_X would also be displayed
{
std::string::size_type pos_ = line.find("<");
std::string begin = line.substr(pos_ +1);
// This way of working I personally find quit sucky, but atof won't work with strings.
stringstream ss(begin);
float beg = 0;
ss>>beg;
m[k][i-4] = beg;
}
}
if(positie[18] != std::string::npos)
{
x = 2;
f = 3;
k++;
break;
}
}
}
}
else { cout << "einde";}
}
//closing the file via the member function close() --> text.close()
text.close();
}
return m;
}
virtual ~X(){
std::cout<<"Destructor";
}
};