我创建了一个可以添加,减,乘或除以两个有理数的类。但是,我正在为ToString方法挣扎。当我在主要方法中创建结果时,如何完成我的tostring方法,因为我的编译器告诉我"结果无法解决到变量"。谢谢你
public class Rational {
private static int num;
private static int denom;
public Rational() {
num = 0;
denom = 1;
}
public Rational(int num, int denom) {
this.num = num;
this.denom = denom;
}
public int getNum() {
return num;
}
public int getDenom() {
return denom;
}
public Rational add(Rational rhs) {
return new Rational(num*rhs.denom+rhs.num*denom, denom*rhs.denom);
}
public Rational subtract(Rational rhs) {
return new Rational(num*rhs.denom-rhs.num*denom, denom*rhs.denom);
}
public Rational multiply(Rational rhs) {
return new Rational(num*rhs.num, denom*rhs.denom);
}
public Rational divide(Rational rhs) {
return new Rational(num*rhs.denom, denom*rhs.num);
}
public String toString() {
String str = "" ;
return "" ;
}
public static void main(String[] args) {
Rational r1 = new Rational(1, 2); // 1/2
Rational r2 = new Rational(3, 4); // 3/4
Rational result = new Rational();
result = r1.add(r2);
System.out.println( result.toString() );
}
}
public String toString() {
return num + "/" + denom;
}