题解 | #坐标移动#

#include <stdio.h>
#include <string.h>

int check_key(char a, int* b, int* c)
{
    if(a >= '0' && a <= '9')
    {
        int value = a - '0' + 1;
        return value;
    }
    else {
        switch(a)
            {
                case'A': *b = -1;  return -1;
                case'D': *b = 1; return -1;
                case'W': *c = 1;  return -1;
                case'S': *c = -1; return -1;
                default: break;
            }
    }
    
    return 0;
    
}

int main() {
    char s[10000];
    scanf("%s", s);
    int state = 0;
    int xlabel = 0, ylabel = 0, x = 0, y = 0, reset = 0;
    int keycount = 0, numcount = 0,num = 0, tmp = 0;

     for(int i = 0; i < strlen(s); i++)
    {
        tmp = check_key(s[i], &xlabel, &ylabel);
        if(tmp < 0)
        {
            keycount++;
            state = 1;
        }
        else if(tmp > 0 && keycount == 1)
        {
            state = 2;
            numcount ++;
            num *= 10;
            num += tmp - 1;
        }
        else if(s[i] == ';')
        {
            if(state == 2 && numcount>= 1 && numcount <= 2 && keycount == 1 && reset == 0)
            {
                x += xlabel * num;
                y += ylabel * num;
            }
            xlabel = 0;
            ylabel = 0;
            keycount = 0;
            numcount = 0;
            num = 0;
            state = 0;
            reset = 0;
        }
        else{
            reset = 1;
        }
    }
    printf("%d,%d",x,y);
    return 0;
}