public class RationalTest {
public static void main(String args[]){
Rational r = new Rational(4, 5);
Rational s = new Rational(3, 8);
Rational t = new Rational(4.3f);
r.print();
s.print();
t.print();
t = r.add(s);
t.print(); }
}class Rational {
private int denominator;
private int numerator;
public Rational(int d, int n){
denominator = d;
numerator = n;
} public Rational(){
denominator = 1;
numerator = 0;
} public int denominator(){
return denominator;
} public int numerator(){
return numerator;
} public Rational add(Rational r){
return new Rational(denominator*r.denominator, (numerator * r.denominator+denominator * r.numerator);
}
public void print(){
System.out.println(numerator + " / " + denominator);
}
}怎样把实数改为分数表示啊? 有限的实数和无限的实数该怎么考虑啊?
public Rational(float f) ?
public static void main(String args[]){
Rational r = new Rational(4, 5);
Rational s = new Rational(3, 8);
Rational t = new Rational(4.3f);
r.print();
s.print();
t.print();
t = r.add(s);
t.print(); }
}class Rational {
private int denominator;
private int numerator;
public Rational(int d, int n){
denominator = d;
numerator = n;
} public Rational(){
denominator = 1;
numerator = 0;
} public int denominator(){
return denominator;
} public int numerator(){
return numerator;
} public Rational add(Rational r){
return new Rational(denominator*r.denominator, (numerator * r.denominator+denominator * r.numerator);
}
public void print(){
System.out.println(numerator + " / " + denominator);
}
}怎样把实数改为分数表示啊? 有限的实数和无限的实数该怎么考虑啊?
public Rational(float f) ?
楼主【todd58】截止到2008-07-03 00:34:36的历史汇总数据(不包括此帖):
发帖的总数量:1 发帖的总分数:20
结贴的总数量:1 结贴的总分数:20
无满意结贴数:0 无满意结贴分:0
未结的帖子数:0 未结的总分数:0
结贴的百分比:100.00% 结分的百分比:100.00%
无满意结贴率:0.00 % 无满意结分率:0.00 %
敬礼!
如果需要功能再好点的话,可以看看 Math 包。import org.apache.commons.lang.math.Fraction;public class Test3 {
public static void main(String[] args) {
double d = Math.PI;
Fraction fraction = Fraction.getFraction(d);
System.out.println(fraction.toString());
System.out.println(fraction.toProperString());
}
}输出:355/113
3 16/113Commons Lang:http://commons.apache.org/lang/
Commons Math:http://commons.apache.org/math/Commons 库都有源代码的,有兴趣的话可以去看看。