hi there can anybody tell me an eas

[grungekid]

hi there can anybody tell me an easy way of reading some data from a text file:

the data in the text file is:

John Smith
22 2 1982
02003456

i have been using getline and atoi, but i am having some problems!

cheers
devo

 

[apatterno]

use fscanf

fsccanf(stream,"%s\n%d %d %d\n%d",...)

_{I REALLY hope that helps.}
Will

 

[grungekid]

That ok if your using a different header!

I am trying to get this to work:

student.txt

John Smith
22 2 1982
02003456


#include <stdlib.h>
#include <iostream.h>
#include <fstream.h>
#include <string.h>

void main (void)
{
//declared variables
char instring[100];
char name[24];
fstream def;

def.open(&quot;student1.txt&quot;,ios::in);

// get name
def.getline(instring,100);
index = 0;
while ((instring[index] <'0') && (instring[index]>'9')) {index++;}
strcpy (name,&instring[index]);
cout << name <<endl;

this prints the name, now i need to get the rest of the info but i'm sure there's an easier way?

// get dob
char value[8];
int dob[3];
def.getline(instring,100);
for (int pos=0;pos<9;pos++)
{
value[pos]=(instring[pos]);
}
pos=0;
dob[0]=atoi(&value[pos]);
pos=3;
dob[1]=atoi(&value[pos]);
pos=5;
dob[2]=atoi(&value[pos]);
for (int mark=0;mark<3;mark++)
{
cout << dob[mark]<< &quot; &quot;;
}
cout << endl;


// get ub number
def.getline(instring,100);
int ubnum;

index = 0;
while ((instring[index] <'0')&& (instring[index]>'9')) {index++;}

ubnum=atoi(&instring[index]);

cout << ubnum << endl;

Note: i have a problem with readingthe ub number, for some reason it is missing out the zero

reads 02003456
prints 2003456

help?

 

[mexicali]

//Hi
#include <string>
#include <fstream>
#include <iostream>
using namespace std;

int main()
{
string str;
ifstream input1;
input1.open(&quot;student1.txt&quot;,ios::in);

while (getline(input1,str))
cout<< str <<endl;

input1.close();

return 0;
}
//Hope this help

 

[ArkM]

Try (includes and validity checks omitted:

namespace { // Locals
const char spc[] = " "; const char nl[] = "\n"; 
} // End of Locals...
/// YMD order ctor parameters!
struct Date
{
 int year, month, day;
 Date(int y = 1970, int m = 1, int d = 1)
     :year(y),month(m),day(d) {}
};

ostream& operator << (ostream& os, const Date& d)
{
 os << d.day << spc << d.month << spc << d.year;
 return os;
}
/// Make more safe class later...
struct Student
{
  string firstname;
  string lastname;
  string name() const { return firstname+&quot; &quot;+lastname; }
  Date   birthday;
  unsigned attr;
  Student(const string& fname, const string& lname,
          Date& bdate, unsigned a):
  firstname(fname), lastname(lname), birthday(bdate), 
  attr(a)
  {}
  string toString() const; // (home work;)
};

ostream& operator << (ostream& os, Student& st)
{
  os << st.firstname + spc + st.lastname + nl;
  os << st.birthday << nl;
  char fch = os.fill('0'); // leading zeroes...
  os << setw(8) << st.attr << nl;
  os.fill(fch); // don't forget to restore fill char...
  return os;
}

namespace { // Locals (continues)
class BadInput {}; // Bad Record exception
inline string& get(istream& in, string& word) 
{ 
  if (in >> word) // get next token
    return word;
  throw BadInput();
}
} // End of Locals

istream& operator >>(istream& in, Student& st)
{
  string word;

  try
  {
    get(in,st.firstname);
    get(in,st.lastname);
    get(in,word); st.birthday.day = atoi(word.c_str());
    get(in,word); st.birthday.month = atoi(word.c_str());
    get(in,word); st.birthday.year = atoi(word.c_str());
    get(in,word); st.attr = atol(word.c_str());
  }
  catch(BadInput&)
  {
  //in.setf(ios_base::failbit); // add later...
  }
  return in;
}

Now:

ifstream fin("student1.txt");
Student st;
int n; // counter...
for (n = 0; fin >> st; ++n)
{
  //...Process record...
}
if (fin.fail()) // Bad record occured...
  ...