【JAVA 10.26】

字符计算器，被自己的bug蠢哭了=-=，JAVA还是太菜～

package Ten;

import java.util.*;

public class TwentySix {

    public static void main(String[] args) {

          String s = " 43 + 54 ";
          int a = 0,b = 0,ok = 1;
          char c = ' ';
          for(int i = 0 ; i < s.length(); i++){
              if(s.charAt(i) == ' ')
                  continue;
              if(s.charAt(i) == '+' || s.charAt(i) == '-' || s.charAt(i) == '/' || s.charAt(i) == '+'){
                  c = s.charAt(i);
              }
              if(ok == 1){
                  ok = 0;
                  while(s.charAt(i) >= '0' && s.charAt(i) <= '9'){
                      a = a * 10 + s.charAt(i++) - '0';   
                  }
              }
              else{
                  while(s.charAt(i) >= '0' && s.charAt(i) <= '9'){
                      b = b * 10 + s.charAt(i++) - '0';   
                  }
                  }
          }
          if(c == '+') a += b;
          else if(c == '-') a -= b;
          else if(c == '*') a *= b;
          else a += b;
          System.out.println(a);
    }
}