teacher.java

这是一个用java做的算术测试小程序,很好用,能够自动获取算术表达式.

public class Teacher
{ int numberOne,numberTwo;
  String operator="";
  boolean right;
  public int giveNumberOne(int n)
  { numberOne=(int)(Math.random()*n)+1;
    return numberOne;
  }
  public int giveNumberTwo(int n)
  { numberTwo=(int)(Math.random()*n)+1;
    return numberTwo;
  }
  public String giveOperator()
  { double d=Math.random();
    if(d>=0.5)
    operator="+";
    else
    operator="-";
    return operator;
  }
 public boolean getRight(int answer)
 { if(operator.equals("+"))
    { if(answer==numberOne+numberTwo)
      right=true;
      else
      right=false;
    }
   else if(operator.equals("-"))
    { if(answer==numberOne+numberTwo)
      right=true;
      else
      right=false;
    }
  return right;
 }
}