添加两个分数 [英] Add two fraction
问题描述
#include< iostream>
using namespace std;
class Fraction {
private：
int num;
int denom;
public：
Fraction（）{
int num = 0;
int denom = 1;
}
Fraction（const Fraction& ref）{
num = ref.num;
denom = ref.denom;
}
Fraction（int arg）{
num = arg;
denom = 1;
}
Fraction（int arg，int arg2）{
num = arg;
if（arg2 == 0）
denom = 1;
else
denom = arg2;
}
〜Fraction（）{
}
void setnum（int arg）{
num =
return;
}
void setdenom（int arg）{
if（arg）{
denom = arg;
} else {
denom = 1;
}
return;
}
int getnum（）const {
return num;
}
int getdenom（）const {
return denom;
}
};
分数加法（Fraction& Fraction&）;
Fraction init（void）;
void print（Fraction&）;
void menu（void）;
int main（）{
menu（）;
return 0;
}
void menu（）{
int option;
Fraction e;
Fraction f;
Fraction g;
cout<< 选项： ;
cin>>选项;
do {
switch（option）{
case 1：
cout< 对于init：< endl;
e = init（）;
f = init（）;
menu（）;
break;
case 2：
cout<< For add：<< endl;
g = addition（e，f）;
break;
case 3：
cout<< For print：< endl;
print（g）;
break;
case 4：
cout<< bb<< endl;
break;
default：
cout<< 错误< endl;
}
} while（option！= 4）;
return;
}
分数加法（Fraction& arg1，Fraction& arg2）{
Fraction temp;
temp.setnum（（arg1.getnum（）* arg2.getdenom（））+（arg1.getdenom（）* arg2.getnum（）））;
temp.setdenom（arg1.getdenom（）* arg2.getdenom（））;
return temp;
}
Fraction init（）{
int num;
int denom;
cout<< num：;
cin>> num;
cout<< denom：;
cin>> ;
分数信息（num，denom）;
返回信息;
}
void print（Fraction& info）{
cout< num：< info.getnum（）<< endl;
cout<< denom：< info.getdenom（）<< endl;
return;
}
我正在让一个程序添加两个分数
我有3个选项的菜单：初始化，添加和打印
我的计划是：
首先，我选择init选项，然后输入两个分数
，然后我将回到菜单并选择选项添加以添加两个分数
，最后我选择打印打印结果
但是从上面的程序，麻烦从init选项
实际上我可以做输入，但是当我回到菜单，并添加，
添加不起作用
我认为它不工作，因为添加函数没有得到输入
$
对不起，因为我可怜的英语
菜单函数被破坏。它只读取输入一次，然后永远循环（除非它 1 或 4 ）。您应该在循环中读取选项的值。并删除选项1中不必要的递归。
void menu（）{
int option;
Fraction e;
Fraction f;
Fraction g;
do {
cout<< 选项： ;
cin>>选项;
switch（option）{
case 1：
cout< 对于init：< endl;
e = init（）;
f = init（）;
// menu（）; < - 删除
break;
case 2：
cout<< For add：<< endl;
g = addition（e，f）;
break;
case 3：
cout<< For print：< endl;
print（g）;
break;
case 4：
cout<< bb<< endl;
break;
default：
cout<< 错误< endl;
}
} while（option！= 4）;
return;
}
#include <iostream>
using namespace std;
class Fraction {
private:
int num;
int denom;
public:
Fraction() {
int num = 0;
int denom = 1;
}
Fraction(const Fraction& ref) {
num = ref.num;
denom = ref.denom;
}
Fraction(int arg) {
num = arg;
denom = 1;
}
Fraction(int arg, int arg2) {
num = arg;
if (arg2 == 0)
denom = 1;
else
denom = arg2;
}
~Fraction() {
}
void setnum(int arg) {
num = arg;
return;
}
void setdenom(int arg) {
if(arg) {
denom = arg;
} else {
denom = 1;
}
return;
}
int getnum() const {
return num;
}
int getdenom() const {
return denom;
}
};
Fraction addition(Fraction&, Fraction&);
Fraction init(void);
void print(Fraction&);
void menu(void);
int main() {
menu();
return 0;
}
void menu() {
int option;
Fraction e;
Fraction f;
Fraction g;
cout << "option: ";
cin >> option;
do {
switch(option) {
case 1:
cout << "For init: " << endl;
e = init();
f = init();
menu();
break;
case 2:
cout << "For add: " << endl;
g = addition(e,f);
break;
case 3:
cout << "For print: " << endl;
print(g);
break;
case 4:
cout << "bb" << endl;
break;
default:
cout << "Wrong" << endl;
}
}while(option != 4);
return;
}
Fraction addition(Fraction& arg1, Fraction& arg2) {
Fraction temp;
temp.setnum((arg1.getnum() * arg2.getdenom()) + (arg1.getdenom() * arg2.getnum()));
temp.setdenom(arg1.getdenom() * arg2.getdenom());
return temp;
}
Fraction init() {
int num;
int denom;
cout << "num: ";
cin >> num;
cout << "denom: ";
cin >> denom;
Fraction info(num, denom);
return info;
}
void print(Fraction& info) {
cout << "num: " << info.getnum() << endl;
cout << "denom: " << info.getdenom() << endl;
return;
}
I am making a program to add two fraction
and I have menu for 3 option: initialization, addition and print
My plan is:
First I select the option init, and input two fractions
then I will go back to menu and select the option addition to add up two fractions
and at the last I select the option print to print the result
But from the above program, I always got trouble from the init option
actually I could do the input, but when I went back to menu and did the addition,
the addition won't work
I think it was not working because the addition function didn't get the input
So I want to ask how can I fix this?
Sorry for my poor English
The menu function is broken. It reads the input only once and then cycles forever (unless it's 1 or 4). You should read the option value inside the loop. And remove the unnecessary recursion in option 1.
void menu() {
int option;
Fraction e;
Fraction f;
Fraction g;
do {
cout << "option: ";
cin >> option;
switch(option) {
case 1:
cout << "For init: " << endl;
e = init();
f = init();
// menu(); <-- Remove this
break;
case 2:
cout << "For add: " << endl;
g = addition(e,f);
break;
case 3:
cout << "For print: " << endl;
print(g);
break;
case 4:
cout << "bb" << endl;
break;
default:
cout << "Wrong" << endl;
}
}while(option != 4);
return;
}
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