回答編集履歴
2
コードを追加しました。
test
CHANGED
|
@@ -58,4 +58,6 @@
|
|
|
58
58
|
|
|
59
59
|
}
|
|
60
60
|
|
|
61
|
+
}
|
|
62
|
+
|
|
61
|
-
|
|
63
|
+
```
|
1
コードを追加しました。
test
CHANGED
|
@@ -6,4 +6,56 @@
|
|
|
6
6
|
|
|
7
7
|
https://wandbox.org/permlink/ARajJldEjsVlk1kA
|
|
8
8
|
|
|
9
|
+
```C++
|
|
10
|
+
|
|
11
|
+
class Fraction;
|
|
12
|
+
|
|
13
|
+
Fraction operator+( Fraction, Fraction );
|
|
14
|
+
|
|
15
|
+
Fraction operator-( Fraction, Fraction );
|
|
16
|
+
|
|
17
|
+
Fraction operator*( Fraction, Fraction );
|
|
18
|
+
|
|
19
|
+
Fraction operator/( Fraction, Fraction );
|
|
20
|
+
|
|
21
|
+
|
|
22
|
+
|
|
23
|
+
class Fraction {
|
|
24
|
+
|
|
25
|
+
...
|
|
26
|
+
|
|
27
|
+
};
|
|
28
|
+
|
|
29
|
+
|
|
30
|
+
|
|
31
|
+
int main() {
|
|
32
|
+
|
|
33
|
+
Fraction half(5, 10);
|
|
34
|
+
|
|
9
|
-
|
|
35
|
+
Fraction sixth(6, 36);
|
|
36
|
+
|
|
37
|
+
|
|
38
|
+
|
|
39
|
+
std::cout << "operator +: " << half << " + " << sixth << " = " << half + sixth << "\n";
|
|
40
|
+
|
|
41
|
+
std::cout << "operator -: " << half << " - " << sixth << " = " << half - sixth << "\n";
|
|
42
|
+
|
|
43
|
+
std::cout << "operator *: " << half << " * " << sixth << " = " << half * sixth << "\n";
|
|
44
|
+
|
|
45
|
+
std::cout << "operator /: " << half << " / " << sixth << " = " << half / sixth << "\n";
|
|
46
|
+
|
|
47
|
+
|
|
48
|
+
|
|
49
|
+
// 以下の正しいやり方が知りたい
|
|
50
|
+
|
|
51
|
+
std::vector<std::string> ops_str{"+", "-", "*", "/"};
|
|
52
|
+
|
|
53
|
+
std::vector ops{&operator+, &operator-, &operator*, &operator/};
|
|
54
|
+
|
|
55
|
+
for (int i = 0; i < 4; ++i) {
|
|
56
|
+
|
|
57
|
+
std::cout << "operator " << ops_str[i] << ": " << half << " " << ops_str[i] << " " << sixth << " = " << ops[i]( half, sixth ) << "\n";
|
|
58
|
+
|
|
59
|
+
}
|
|
60
|
+
|
|
61
|
+
}```
|