#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;
}

• double精度不够 (1023) FinalLaugh 2004-10-26 07:43:06
  • Re:double精度不够 (0) baofenye 2004-10-26 11:41:20
    • 请问 double 的精度为几位？ (29) baofenye 2004-10-26 11:43:14
      • Re:请问 double 的精度为几位？ (58) FinalLaugh 2004-10-26 12:29:46
• Re:HELP!!! Is there any problem in this program? (1023) yuqi1314 2008-10-04 15:21:39
  • Re:HELP!!! Is there any problem in this program? (45) yuqi1314 2008-10-04 15:23:17