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分数四则运算
import java.util.*;
import java.math.*;
class S{
public int h, g;
S add(int a,int b,int c,int d){
int sum = a*d+b*c;
return ( this.hua( sum, (b*d) ) );
}
S sub(int a,int b,int c,int d){
int sum = a*d-b*c;
return ( this.hua( sum, (b*d) ) );
}
S cheng(int a,int b,int c,int d){
int sum = a*c;
return ( this.hua( sum, (b*d) ) );
}
S chu(int a,int b,int c,int d){
int sum = a*d;
return ( this.hua( sum, (c*b) ) );
}
S hua(int n, int m){
int mm=Math.max(Math.abs(n), Math.abs(m));
int nn=Math.min(Math.abs(n), Math.abs(m));
int r;
while(nn!=0){
r=mm%nn;
mm=nn;
nn=r;
}
h = n/mm;
g = m/mm;
return (this);
}
}
public class Main{
public static void main(String[] args){
Scanner scanner = new Scanner(System.in);
while ( scanner.hasNext() ){
String s1 = scanner.next();
char[] ch1 = s1.toCharArray();
int temp = 0, i, j;
for ( i = 0;i < ch1.length; i++ ){
if ( ch1[i] == '+' )
temp = 1;
else if ( ch1[i] == '-' )
temp = 2;
else if ( ch1[i] == '*' )
temp = 3;
else if ( ch1[i] == '\\' )
temp = 4;
}
if ( temp == 1 ){
String[] s2 = s1.split("\\+");
String[] s3 = s2[0].split("\\/");