#include "custom.h" | |
extern BUSTBOXPTR A ; | |
int perimeter(void) | |
{ | |
int i , sum ; | |
sum = 0 ; | |
for( i = 1 ; i <= A[0].xc ; i++ ) { | |
if( i == A[0].xc ) { | |
sum += ABS(A[1].xc - A[i].xc) + ABS(A[1].yc - A[i].yc) ; | |
} else { | |
sum += ABS(A[i + 1].xc - A[i].xc) + ABS(A[i + 1].yc - A[i].yc) ; | |
} | |
} | |
return( sum ) ; | |
} |