Online JudgeProblem SetAuthorsOnline ContestsUser
Web Board
F.A.Qs
Statistical Charts
Problems
Submit Problem
Online Status
Prob.ID:
Register
Authors ranklist
Current Contest
Past Contests
Scheduled Contests
Award Contest
Register

## HELP!!! Is there any problem in this program?

Posted by baofenye at 2004-10-25 22:21:45 on Problem 1654
```#include <stdio.h>
#include <math.h>
int main ( void )
{
int i, n, x, y, xx, yy;
double carea, area;
char ch;

scanf ( "%d", &n );
for ( i = 0; i < n; i ++ )
{
x = y = 0;
carea = area = 0;

while ( 1 )
{
xx = x;
yy = y;
scanf ( "%c", &ch );
if ( ch == '5' ) break;
switch ( ch )
{
case '1':	x --;    y --;    break;
case '2':	y --;	      	  break;
case '3':	x ++;    y --;    break;
case '4':	x --;             break;
case '6':	x ++;             break;
case '7':	x --;    y ++;    break;
case '8':	y ++;             break;
case '9':	x ++;    y ++;    break;
}
carea += xx * y - yy * x;
if ( x == 0 && y == 0 )
{
area += fabs ( carea );
carea = 0;
}
}
area /= 2;
printf ( "%.0f", area );
if ( ceil ( area ) - area > 0.4 )  printf ( ".5" );
printf ( "\n" );
}
return 0;
}```

Followed by: