bit masking is very common on the lower level code.
#include <cstdio>
#include <algorithm>
#define MAXSIZE 205
char line[MAXSIZE];
int main() {
//freopen("input.txt","r",stdin);
int x,y, dir; // (dir&3) 0,1,2,3 -- right,up,left,down
char *p;
while(scanf("%s",line)!=EOF) {
puts("300 420 moveto\n310 420 lineto");
x=310, y=420, dir=0;
for(p=line;*p;++p) {
if(*p=='A') { --dir; }
else { ++dir; }
switch(dir&3) {
case 0: x+=10; break;
case 1: y+=10; break;
case 2: x-=10; break;
case 3: y-=10; break;
}
printf("%d %d lineto\n",x,y);
}
puts("stroke\nshowpage");
}
return 0;
}版权声明：本文为博主原创文章，未经博主允许不得转载。// p.s. If in any way improment can be achieved, better performance or whatever, it will be well-appreciated to let me know, thanks in advance.