l*********s
发帖数: 5409 | 1 You will be creating three classes. The first class is called Number, which
supports three operations:
“display”, “==”, and “+”.
1. display: This operation displays the Number itself in its original form (
I will explain later).
2. ==: This operation returns true if two Numbers are numerically the same.
3. +: This operation adds the number itself with another number and returns
a third number
whose numeric value is equal to the sum of the numeric values of the former
two. |
l*********s
发帖数: 5409 | 2 学艺不精，遇到点问题：
Number类应该是个虚拟类吧，但是加法函数的接口怎么写呢？做为方法的话,返回值是
Number的话Fraction和Integer子类无法实例化，不写又不合规定，加上参数次序的问
题，怎么都很别扭！
which
(
returns
former
【在 l*********s 的大作中提到】
: You will be creating three classes. The first class is called Number, which
: supports three operations:
: “display”, “==”, and “+”.
: 1. display: This operation displays the Number itself in its original form (
: I will explain later).
: 2. ==: This operation returns true if two Numbers are numerically the same.
: 3. +: This operation adds the number itself with another number and returns
: a third number
: whose numeric value is equal to the sum of the numeric values of the former
: two.
|
b*******s
发帖数: 5216 | 3 你以前没接触过c++吗？
【在 l*********s 的大作中提到】
: 学艺不精，遇到点问题：
: Number类应该是个虚拟类吧，但是加法函数的接口怎么写呢？做为方法的话,返回值是
: Number的话Fraction和Integer子类无法实例化，不写又不合规定，加上参数次序的问
: 题，怎么都很别扭！
:
: which
: (
: returns
: former
|
N******K
发帖数: 10202 | 4 用template不就行了？
which
(
returns
former
【在 l*********s 的大作中提到】
: You will be creating three classes. The first class is called Number, which
: supports three operations:
: “display”, “==”, and “+”.
: 1. display: This operation displays the Number itself in its original form (
: I will explain later).
: 2. ==: This operation returns true if two Numbers are numerically the same.
: 3. +: This operation adds the number itself with another number and returns
: a third number
: whose numeric value is equal to the sum of the numeric values of the former
: two.
|
b***i
发帖数: 3043 | 5 你的要求不清楚阿.你先说这里有三个类,然后就说了第一个类叫Nmber。然后这里又提
到Fraction。那么他们的要求到底是什么？
【在 l*********s 的大作中提到】
: 学艺不精，遇到点问题：
: Number类应该是个虚拟类吧，但是加法函数的接口怎么写呢？做为方法的话,返回值是
: Number的话Fraction和Integer子类无法实例化，不写又不合规定，加上参数次序的问
: 题，怎么都很别扭！
:
: which
: (
: returns
: former
|
X****r
发帖数: 3557 | 6 Both operator == and operator + likely need to use double dispatch
for a meaningful implementation.
which
(
returns
former
【在 l*********s 的大作中提到】
: You will be creating three classes. The first class is called Number, which
: supports three operations:
: “display”, “==”, and “+”.
: 1. display: This operation displays the Number itself in its original form (
: I will explain later).
: 2. ==: This operation returns true if two Numbers are numerically the same.
: 3. +: This operation adds the number itself with another number and returns
: a third number
: whose numeric value is equal to the sum of the numeric values of the former
: two.
|
l*********s
发帖数: 5409 | 7 就是顶贴的要求，已经搞定了，惭愧。
【在 b***i 的大作中提到】
: 你的要求不清楚阿.你先说这里有三个类,然后就说了第一个类叫Nmber。然后这里又提
: 到Fraction。那么他们的要求到底是什么？
|
l*********s
发帖数: 5409 | 8 是的，一开始想歪了。
【在 N******K 的大作中提到】
: 用template不就行了？
:
: which
: (
: returns
: former
|
