UMBC CS 201, Fall 05
scanf5
Our last example shows that scanf tries to match
items in the input stream.
In this program, we want the user to enter a date with dashes
separating the month, day and year values.
scanf will try to match the dashes. If the dashes don't exist in the
input, the remainder of the values to be scanned will be ignored.
The Program
<![CDATA[
/*********************************************
** File: scanf5.c
** Author: R. Chang
** Modified By: S. Evans
** Date: 3/5/04
** Section: 01XX & 02XX
** EMail: bogar@cs.umbc.edu
**
** This program shows scanf trying to match
** specific characters in the input.
**********************************************/
#include <stdio.h>
int main ( )
{
int month, day, year, numRead;
printf("Enter the date using this format:\n");
printf("##-##-##"\n);
numRead = scanf("%d-%d-%d", &month, &day, &year);
printf("You entered %02d-%02d-%02d\n",
month, day, year);
printf("The number of items read was %d\n",
numRead);
return 0;
}
]]>
The Sample Run
<![CDATA[
linux3[103] % a.out
Enter the date using this format:
##-##-##
9-5-99
You entered 09-05-99
The number of items read was 3
linux3[104] %
linux3[104] % !a
a.out
Enter the date using this format:
##-##-##
09-05-99
You entered 09-05-99
The number of items read was 3
linux3[105] % !a
a.out
Enter the date using this format:
##-##-##
9-5-1999
You entered 09-05-1999
The number of items read was 3
linux3[106] % !a
a.out
Enter the date using this format:
##-##-##
9/5/1999
You entered 09-134518160-134513643
The number of items read was 1
linux3[107] %
]]>
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Monday, 26-Sep-2005 11:20:20 EDT
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