59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/* ex2-c: Advent2020 game, day 12/game 2
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define ABS(i) ((i)>=0?(i):(-i))
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int main(ac, av)
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int ac;
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char **av;
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{
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char line[512], command;
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unsigned val, direction, i;
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int x=0, y=0, wx=10, wy=1, tmp;
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while (fgets(line, sizeof line, stdin)) {
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command=*line;
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val=atoi(line+1);
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direction=0;
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switch (command) {
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case 'L':
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direction=360-val;
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break;
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case 'R':
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direction=val;
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break;
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case 'F':
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for (i=0; i<val; ++i) {
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x+=wx;
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y+=wy;
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}
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break;
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case 'N':
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wy+=val;
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break;
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case 'E':
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wx+=val;
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break;
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case 'S':
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wy-=val;
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break;
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case 'W':
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wx-=val;
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break;
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}
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if (direction) {
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for (i=90; i<=direction; i+=90) {
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tmp=wy;
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wy=-wx;
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wx=tmp;
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}
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}
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}
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printf("%s : res=%d\n", *av, ABS(x)+ABS(y));
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exit (0);
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}
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