dev-cpp-users

[Dev-C++] line skip

[Noorez K. <coo...@ho...>]

The marked program line in the loop is skipping on the first time around. It 
is the cin.getline() function.

#include <iostream>
#include <cstdlib>
#include <direct.h>
using namespace std;

int system(bool cls);
int main()
{
  cout << "Easy to use dos-prompt!" << endl;
  cout << "\nTo switch dirves use this: drvswitch\n";
  cout << "\nTo quit you can use any one of the following commands: \n"
       << "quit, bye, exit\n";

  char ask;

  do
  {
    cout << "\nWould you like to enter the system? [Y\\N]";
    cin >> ask;

    if(ask == 'y' || ask == 'Y')
    {//main if

     cout << "\nYou can also have the program Clear Screen automaticly after 
each command.\n";
     cout << "Is this Ok [Y\\N] ";

     char cls;
     bool cLs;
     cin >> cls;
     if(cls == 'y' || cls == 'Y')
     {
       cLs = TRUE;
     }

     else if(cls == 'n' || cls == 'N')
     {
       cLs = FALSE;
     }

     else
     {
       cout << "What...";
       cout << "Default is set. No Clear Screen!\n";
       cLs = FALSE;
     }
     //return to main test
     system(cLs);
     system("pause");
     return 0;
    }

    else if(ask == 'n' || ask == 'N')
    {
      cout << "Bye!" << endl;
      system("pause");
      return 0;
    }

    else
    {
      cout << "What....\n" << endl;
    }

  }while(ask != 'y' || ask != 'Y' || ask != 'n' || ask != 'N');

  return 0;
}

//define the system function
int system(bool cls)
{

  drvswitch:

  char drv[8];
  cout << "\nEnter the name of the drive you want to go to: ";
  cin >> drv;
  strcat(drv,":");
  chdir(drv);

  cout << "Now in drive " << drv << "\\" << endl;
  cout << "You may type in commands" << endl;
  system("pause");
  strcat(drv,"\\>");

  char coms[123];

  while(1)
  {
    cout << drv;
    cin.getline(coms,124); //this is skipping

    if( strcmp(coms,"exit")==0 || strcmp(coms,"bye")==0 || 
strcmp(coms,"quit")==0 )
    {
      return 0;
    }

    if(strcmp(coms,"drvswitch")==0)
    {
       goto drvswitch;
    }

    system(coms);

    if(cls == TRUE)
    {
      system("pause");
      system("cls");
    }

    cout << endl;
  }//while
}

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Re: [Dev-C++] line skip

[Paul I. <pi...@ot...>]

Quoting Noorez Kassam <coo...@ho...>:

> The marked program line in the loop is skipping on the first time aroun=
d. It
>=20
> is the cin.getline() function.
>=20

Where?=20


btw, noticed the line:

while(ask !=3D 'y' || ask !=3D 'Y' || ask !=3D 'n' || ask !=3D 'N')

this will always be true. (If ask =3D=3D 'y' then ask !=3D 'Y' ...)


> #include <iostream>
> #include <cstdlib>
> #include <direct.h>
> using namespace std;
>=20
> int system(bool cls);
> int main()
> {
>   cout << "Easy to use dos-prompt!" << endl;
>   cout << "\nTo switch dirves use this: drvswitch\n";
>   cout << "\nTo quit you can use any one of the following commands: \n"
>        << "quit, bye, exit\n";
>=20
>   char ask;
>=20
>   do
>   {
>     cout << "\nWould you like to enter the system? [Y\\N]";
>     cin >> ask;
>=20
>     if(ask =3D=3D 'y' || ask =3D=3D 'Y')
>     {//main if
>=20
>      cout << "\nYou can also have the program Clear Screen automaticly =
after
>=20
> each command.\n";
>      cout << "Is this Ok [Y\\N] ";
>=20
>      char cls;
>      bool cLs;
>      cin >> cls;
>      if(cls =3D=3D 'y' || cls =3D=3D 'Y')
>      {
>        cLs =3D TRUE;
>      }
>=20
>      else if(cls =3D=3D 'n' || cls =3D=3D 'N')
>      {
>        cLs =3D FALSE;
>      }
>=20
>      else
>      {
>        cout << "What...";
>        cout << "Default is set. No Clear Screen!\n";
>        cLs =3D FALSE;
>      }
>      //return to main test
>      system(cLs);
>      system("pause");
>      return 0;
>     }
>=20
>     else if(ask =3D=3D 'n' || ask =3D=3D 'N')
>     {
>       cout << "Bye!" << endl;
>       system("pause");
>       return 0;
>     }
>=20
>     else
>     {
>       cout << "What....\n" << endl;
>     }
>=20
>   }while(ask !=3D 'y' || ask !=3D 'Y' || ask !=3D 'n' || ask !=3D 'N');
>=20
>   return 0;
> }
>=20
> //define the system function
> int system(bool cls)
> {
>=20
>   drvswitch:
>=20
>   char drv[8];
>   cout << "\nEnter the name of the drive you want to go to: ";
>   cin >> drv;
>   strcat(drv,":");
>   chdir(drv);
>=20
>   cout << "Now in drive " << drv << "\\" << endl;
>   cout << "You may type in commands" << endl;
>   system("pause");
>   strcat(drv,"\\>");
>=20
>   char coms[123];
>=20
>   while(1)
>   {
>     cout << drv;
>     cin.getline(coms,124); //this is skipping
>=20
>     if( strcmp(coms,"exit")=3D=3D0 || strcmp(coms,"bye")=3D=3D0 ||=20
> strcmp(coms,"quit")=3D=3D0 )
>     {
>       return 0;
>     }
>=20
>     if(strcmp(coms,"drvswitch")=3D=3D0)
>     {
>        goto drvswitch;
>     }
>=20
>     system(coms);
>=20
>     if(cls =3D=3D TRUE)
>     {
>       system("pause");
>       system("cls");
>     }
>=20
>     cout << endl;
>   }//while
> }
>=20
> _________________________________________________________________
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>
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fjoin.msn.com%2f%3fpage%3dmisc%2fspecialoffers%26pgmarket%3den-ca
>=20
>=20
>=20
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>=20
>=20