import *;
public class cacluate {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
     int a,b,c;
     System.out.print("请输入a:");
     try{
         BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
         String inputLine=in.readLine();
         a=Integer.valueOf(inputLine).intValue();
     }catch(Exception exc){System.out.println("用户输入错误！");
     return;
     }
     System.out.print("请输入b:");
     try{
         BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
         String inputLine=in.readLine();
         b=Integer.valueOf(inputLine).intValue();
     }catch(Exception exc){System.out.println("用户输入错误！");
     return;
     }
     if(a>b)
          c=a;
     System.out.println(c);
     
    }
}
为什么最后一个输出语句会有错误，，，不懂，，，，另外求一名高人指点一下我JAVA，，，，QQ329956247可以帮我的家一下我，感激不尽