public static Fraction add(Fraction a, Fraction b, Fraction... fractions) {
Fraction result = Fraction.add(a, b);
for (Fraction c : fractions) {
result = Fraction.add(result, c);
}
return result;
}
public static void main(String args[]){
Scanner in=new Scanner(System.in);
String op=null;
while(in.hasNext()){
String line=in.nextLine();
StringTokenizer token=new StringTokenizer(line,"/+-",true);
int i=0;
String data[]=new String[token.countTokens()];
while(token.hasMoreTokens())
{
data[i]=token.nextToken();
i++;
}
Fraction a=new Fraction();
Fraction b=new Fraction();
Fraction c=new Fraction();
Fraction d=new Fraction();
a.set(data[0],data[2]);
b.set(data[4],data[6]);
if(data[3].equals("+"))
a.add(b).print();
else
a.subtract(b).print();
}
}
/** Return the sum of the elements in the array. Return 0/1 if the length of the array is 0. */
public static final Fraction sum(Fraction[] array) {
Fraction sum = new Fraction(0, 1);
for (Fraction element : array) {
sum = sum.add(element);
}
return sum;
}
public static void main(String[] args) throws Exception {
PrintWriter pen = new PrintWriter(System.out, true);
Fraction f1;
f1 = new Fraction(3, 10);
Fraction f2;
f2 = new Fraction(2, 5);
pen.println("First fraction: " + f1);
pen.println("Second fraction: " + f2);
pen.println("Sum: " + (f1.add(f2)));
} // main(String[])
/**
* Return the dot product of the two arrays. If the lengths of the array are both 0, return 0/1.
* If the two arrays do not have the same length, throw an IllegalArgumentException.
*/
public static final Fraction dotProduct(final Fraction[] array1, final Fraction[] array2) {
int length = _commonLength(array1, array2, "FractionArrayMath.dotProduct");
Fraction sum = new Fraction(0, 1);
for (int i = 0; i < length; i++) {
sum = sum.add(array1[i].multiply(array2[i]));
}
return sum;
}
public static void main(String[] args) {
Fraction f1 = new Fraction();
Fraction f2 = new Fraction();
for (int i = 1; i <= 4; i++) {
f1.numerator = 1;
f1.denominator = 2;
f2.numerator = 3;
f2.denominator = 4;
switch (i) {
case 1:
System.out.println("f1=" + f1.numerator + "/" + f1.denominator);
System.out.println("f2=" + f2.numerator + "/" + f2.denominator);
f1.add(f2);
System.out.println("f1+f2=" + f1.numerator + "/" + f1.denominator);
break;
case 2:
f1.add(3);
System.out.println("f1+3=" + f1.numerator + "/" + f1.denominator);
break;
case 3:
f2.sub(f1);
System.out.println("f2-f1=" + f2.numerator + "/" + f2.denominator);
break;
case 4:
f2.sub(1);
System.out.println("f2-1=" + f2.numerator + "/" + f2.denominator);
break;
}
}
}
@Test
public void testDivide() {
assertEquals(myFraction1.divide(myFraction2).toString(), "4 / 3");
assertEquals(myFraction3.divide(myFraction4).toString(), "5 / 2");
myFraction1 = myFraction1.add(myFraction1);
}
@Test
public void testMultiply() {
assertEquals(myFraction1.multiply(myFraction2).toString(), "12 / 25");
assertEquals(myFraction3.multiply(myFraction4).toString(), "10 / 49");
myFraction1 = myFraction1.add(myFraction1);
}
@Test
public void testSubtract() {
assertEquals(myFraction1.subtract(myFraction2).toString(), "1 / 5");
assertEquals(myFraction3.subtract(myFraction4).toString(), "3 / 7");
myFraction1 = myFraction1.add(myFraction1);
}
@Test
public void testAdd() {
assertEquals(myFraction1.add(myFraction2).toString(), "7 / 5");
assertEquals(myFraction3.add(myFraction4).toString(), "1");
myFraction1 = myFraction1.add(myFraction1);
}
