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getch() , how to use it in Unix

MeldrozMeldroz
in LINUX programming
Hi guys and gals,

i have this code:

#include
#include
#include
#include //Library of time and date functions
#include // added for unix acces to getch()

void displayRandomStars(int n);
char* getpass();

int main ( )
{
char pass[25]={''};
srand(time(NULL));// seed random generator
printf("Enter password :");
strcpy(pass,getpass());
printf("password is %s
", pass);
return 0;

}


char* getpass()
{

static char buffer[25]={''}; //password are usually not as big as buffer.
char ch;
int counter = 0;
ch = getch();
do
{

displayRandomStars((rand() % 5)+1); //between 1-5 stars
buffer[counter] = ch;
counter++;
ch = getch();
}
while (ch != '
');
return buffer;
}

void displayRandomStars(int n)
{

int i = 0;
for (; i < n; i++)
{
putchar('*');
}

}

works in windows but in unix i get this:
/tmp/ccyeHYWU.o: In function `myGetpass':
/tmp/ccyeHYWU.o(.text+0x11): undefined reference to `stdscr'
/tmp/ccyeHYWU.o(.text+0x17): undefined reference to `wgetch'
/tmp/ccyeHYWU.o(.text+0x76): undefined reference to `stdscr'
/tmp/ccyeHYWU.o(.text+0x7c): undefined reference to `wgetch'

I'm not even using these functions, anyone know what's going on,
get back to me when you get a chance heavenly ones lol.
Mel

Comments

  • nugentnugent
    you're getting the errors because you didn't link to the curses library when you compiled your program. Try:

    gcc program.c -o program -lcurses

    I'm not sure that your program will work because you have to initalise ncurses etc...

    Try this:

    #include // This include stdio.h

    int main()
    {
    initscr(); // Initalise the ncurses library
    cbreak(); // option to disable buffering etc.
    noecho(); // disable the echoing of keystrokes
    printw("Enter Password: "); // print some text to the screen
    refresh(); // update the screen, so the text is displayed
    char pass[25]; // a place to store the text
    getstr(pass); // get text until newline or carriage return
    endwin(); // close ncurses library

    printf("You entered: %s
    ", pass); // print what the user typed to stdout

    return 0;
    }


    compile with:

    gcc prog2.c -o prog2 -lncurses

    for more a tutorial on using the ncurses library see

    http://www.tldp.org/HOWTO/NCURSES-Programming-HOWTO/

    ------
    nugent
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