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parsing date strings mm/dd/yy??

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Join Date: Mar 2005

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parsing date strings mm/dd/yy??

Mar 29th, 2005

I have a program to write that takes in the date in ##/##/## format. I then write the month day, year output. What I'm totally lost on is how to get from reading the char array to integer numbers?? Big time Lost! Need help!

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Re: parsing date strings mm/dd/yy??

Mar 29th, 2005

Is this C or C++?

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Re: parsing date strings mm/dd/yy??

Mar 30th, 2005

c++, guess I should have included that.

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Re: parsing date strings mm/dd/yy??

Mar 30th, 2005

Here's a start:

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#include <cstdlib>
#include <iostream>
#include <sstream>
#include <string>
 
using namespace std;
 
int main()
{
  istringstream in ( "03/30/05" );
  int m, d, y;
 
  in>> m;
  if ( in.peek() != '/' ) {
    cerr<<"Invalid format"<<endl;
    return EXIT_FAILURE;
  }
 
  in.ignore();
  in>> d;
  if ( in.peek() != '/' ) {
    cerr<<"Invalid format"<<endl;
    return EXIT_FAILURE;
  }
 
  in.ignore();
  in>> y;
 
  cout<< m <<' '<< d <<' '<< y <<endl;
}
#include <cstdlib>
#include <iostream>
#include <sstream>
#include <string>

using namespace std;

int main()
{
  istringstream in ( "03/30/05" );
  int m, d, y;

  in>> m;
  if ( in.peek() != '/' ) {
    cerr<<"Invalid format"<<endl;
    return EXIT_FAILURE;
  }

  in.ignore();
  in>> d;
  if ( in.peek() != '/' ) {
    cerr<<"Invalid format"<<endl;
    return EXIT_FAILURE;
  }

  in.ignore();
  in>> y;

  cout<< m <<' '<< d <<' '<< y <<endl;
}

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Re: parsing date strings mm/dd/yy??

Mar 30th, 2005

Thanks for the code, however, I'm really at a loss to how it works. We've not yet gone this far in C++, only arrays & some work with strings. Can I put a cout prompt & cin to input the date this way? ex.

cout << "Input date in format mm/dd/yy :\n";
char date[9];
cin >> date;

As I have to error check the date, and later output it in a function converting to monthname dd, 20##.

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Narue

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Re: parsing date strings mm/dd/yy??

Mar 30th, 2005

>We've not yet gone this far in C++
Oh, so this is homework? In that case you'll need to show some effort in the form of an existing attempt, or detailed examples of what steps you went through while trying to figure out a solution and what you learned in the process. And posting here doesn't count.

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