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Full Discussion: problem with scanf
Top Forums Programming problem with scanf Post 91707 by matrixmadhan on Monday 5th of December 2005 03:27:12 AM
Old 12-05-2005
Quote:
#include<stdio.h>
#include<stdlib.h>

int main()
{
int a;
char b[20];
char c[20];
printf("\nenter the value of b:");
scanf("%[^\n]",b);
printf("\nb=%s",b);
printf("\nenter the value of a:");
scanf("%d",&a);
printf("\na=%d",a);
printf("\n enter the values of c:");

fflush(stdin);

scanf("%[^\n]",c);
printf("\nc=%s",c);
return 0;
}
you have instructed scanf to read for the variable
except "\n" but "\n" is still there in the buffer,
hence for concurrent reads of the same datatype
flush the "\n" (buffer) before you could proceed ...
to read the next variable's value
 

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curs_scanw(3X)															    curs_scanw(3X)

NAME
scanw, wscanw, mvscanw, mvwscanw, vwscanw, vw_scanw - convert formatted input from a curses window SYNOPSIS
#include <curses.h> int scanw(char *fmt [, arg] ...); int wscanw(WINDOW *win, char *fmt [, arg] ...); int mvscanw(int y, int x, char *fmt [, arg] ...); int mvwscanw(WINDOW *win, int y, int x, char *fmt [, arg] ...); int vw_scanw(WINDOW *win, char *fmt, va_list varglist); int vwscanw(WINDOW *win, char *fmt, va_list varglist); DESCRIPTION
The scanw, wscanw and mvscanw routines are analogous to scanf [see scanf(3S)]. The effect of these routines is as though wgetstr were called on the window, and the resulting line used as input for sscanf(3). Fields which do not map to a variable in the fmt field are lost. The vwscanw routine is similar to vwprintw in that it performs a wscanw using a variable argument list. The third argument is a va_list, a pointer to a list of arguments, as defined in <varargs.h>. RETURN VALUE
vwscanw returns ERR on failure and an integer equal to the number of fields scanned on success. Applications may use the return value from the scanw, wscanw, mvscanw and mvwscanw routines to determine the number of fields which were mapped in the call. PORTABILITY
The XSI Curses standard, Issue 4 describes these functions. The function vwscanw is marked TO BE WITHDRAWN, and is to be replaced by a function vw_scanw using the <stdarg.h> interface. SEE ALSO
curses(3X), curs_getstr(3X), curs_printw(3X), scanf(3S) curs_scanw(3X)
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