1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
| import java.math.BigInteger;
import java.util.Scanner;
class Rational {
private BigInteger num;
private BigInteger den;
Rational(String s)
{
if (s.contains("/"))
{
String [] nd = s.split("/");
num=new BigInteger(nd[0]);
den=new BigInteger(nd[1]);
}
else
{
num=new BigInteger(s);
den=new BigInteger("1");
}
}
Rational(String n, String d)
{
BigInteger tmp=new BigInteger(n);
if (tmp.intValue()==0)
{
num=new BigInteger("0");
den=new BigInteger("1");
}
else
{
num=new BigInteger(n);
den=new BigInteger(d);
}
}
Rational(BigInteger n, BigInteger d)
{
num=n;
den=d;
}
Rational(BigInteger n)
{
num=n;
den=new BigInteger("1");
}
public Rational add(Rational a) {
BigInteger n1,d1,n2,d2,nn1,nn2,nn,dd,g;
n1=num;
d1=den;
n2=a.num;
d2=a.den;
nn1=n1.multiply(d2);
nn2=n2.multiply(d1);
nn =nn2.add(nn1);
dd =d1.multiply(d2);
g =nn.gcd(dd);
nn =nn.divide(g);
dd =dd.divide(g);
Rational r=new Rational(nn,dd);
return r;
}
public Rational sub(Rational a) {
BigInteger n1,d1,n2,d2,nn1,nn2,nn,dd,g;
n1=num;
d1=den;
n2=a.num;
d2=a.den;
nn1=n1.multiply(d2);
nn2=n2.multiply(d1);
nn =nn2.subtract(nn1);
dd =d1.multiply(d2);
g =nn.gcd(dd);
nn =nn.divide(g);
dd =dd.divide(g);
Rational r=new Rational(nn,dd);
return r;
}
public Rational mul(Rational a) {
BigInteger n1,d1,n2,d2,nn1,nn2,nn,dd,g;
n1=num;
d1=den;
n2=a.num;
d2=a.den;
nn1=n1.multiply(n2);
dd =d1.multiply(d2);
g =nn1.gcd(dd);
nn =nn1.divide(g);
dd =dd.divide(g);
Rational r=new Rational(nn,dd);
return r;
}
public String toString() {
if (num.compareTo(den)==0)
return "1";
else
if (num.compareTo( new BigInteger("0"))==0)
return "0";
else
return num.toString()+"/"+den.toString();
}
}
class Start {
public static void main(String [] args)
{
String a1,a2;
Scanner in = new Scanner(System.in);
System.out.print("a1=");
a1=in.next();
System.out.print("a2=");
a2=in.next();
Rational r1 = new Rational(a1);
Rational r2 = new Rational(a2);
Rational r = r1.add(r2);
System.out.println("add="+r.toString());
System.out.println("sub="+(r2.sub(r1)).toString());
System.out.println("mul="+(r2.mul(r1)).toString());
}
} |
(
