Java程序来简化不起作用的分数。
我正在尝试编写一个程序,从用户那里获取两个分数(以a/b的形式),并对它们进行某些操作,简化结果。我的数学算对了,但简化部分我运气不好。我每次运行程序都会遇到算术异常 有人能给我指出正确的方向,并对我的代码提供一些反馈吗 欢迎提出任何建议,并表示感谢 主要类别:Java程序来简化不起作用的分数。,java,fractions,simplify,greatest-common-divisor,Java,Fractions,Simplify,Greatest Common Divisor,我正在尝试编写一个程序,从用户那里获取两个分数(以a/b的形式),并对它们进行某些操作,简化结果。我的数学算对了,但简化部分我运气不好。我每次运行程序都会遇到算术异常 有人能给我指出正确的方向,并对我的代码提供一些反馈吗 欢迎提出任何建议,并表示感谢 主要类别: import java.util.*; public class Fraction { /** * @param args */ @SuppressW
import java.util.*;
public class Fraction {
/**
* @param args
*/
@SuppressWarnings("resource")
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Please enter your first fraction:");
String frac = input.nextLine();
Driver f1 = new Driver(frac);
System.out.println("Please enter your second fraction:");
String frac2 = input.nextLine();
Driver f2 = new Driver(frac2);
Driver multiFrac = f1.multiply(f1, f2);
System.out.println("Multiplication: " +multiFrac.getNum()+ "/" + multiFrac.getDenom());
Driver divFrac = f1.divide(f1, f2);
System.out.println("Division: " + divFrac.getNum()+ "/" + divFrac.getDenom());
Driver addFrac = f1.add(f1, f2);
System.out.println("Addition: " + addFrac.getNum()+ "/" + addFrac.getDenom());
Driver subFrac = f1.sub(f1, f2);
System.out.println("Subtraction: " + subFrac.getNum()+ "/" + subFrac.getDenom());
}
}
构造函数类:
public class Driver {
public static int num0;
public static int denom0;
private int denom = 0;
private int num = 0;
public Driver (String frac){
String s0[] = frac.split("/");
int[] numbers0 = new int[s0.length];
for(int i = 0;i < s0.length;i++){
numbers0[i] = Integer.parseInt(s0[i]);
}
num = numbers0[0];
denom = numbers0[1];
}
public Driver(int num0, int denom0) {
num = num0;
denom = denom0;
}
public int getNum(){
int gcf= GCD(num0, denom0);
return (num/gcf);
}
public int getDenom(){
int gcf = GCD(num0, denom0);
return (denom/gcf);
}
public Driver add(Driver firstFrac, Driver secondFrac){
int denom0 = firstFrac.getDenom() * secondFrac.getDenom();
int num0 = firstFrac.getNum() * secondFrac.getDenom() + secondFrac.getNum() * firstFrac.getDenom();
this.GCD(num0, denom0);
return new Driver (num0 , denom0);
}
public Driver sub(Driver firstFrac, Driver secondFrac){
int denom0 = firstFrac.getDenom() * secondFrac.getDenom();
int num0 = (firstFrac.getNum() * secondFrac.getDenom()) - (secondFrac.getNum() * firstFrac.getDenom());
return new Driver (num0 , denom0);
}
public Driver multiply(Driver firstFrac, Driver secondFrac){
int num0 = firstFrac.getNum() * secondFrac.getNum();
int denom0 = firstFrac.getDenom() * secondFrac.getDenom();
return new Driver (num0, denom0);
}
public Driver divide(Driver firstFrac, Driver secondFrac){
int num0 = firstFrac.getNum() * secondFrac.getDenom();
int denom0 = firstFrac.getDenom() * secondFrac.getNum();
this.GCD(num0, denom0);
return new Driver (num0, denom0);
}
public int GCD(int a, int b){
if (b==0) return a;
return GCD(b,a%b);
}
}
公共类驱动程序{
公共静态int num0;
公共静态int-denom0;
私有int-denom=0;
私有int num=0;
公共驱动器(管柱压裂){
字符串s0[]=分形拆分(“/”);
int[]numbers0=新的int[s0.长度];
对于(int i=0;i
这里有一个提示,使用BigDecimal
String str[] = frac.split("/");
BigDecimal top = new BigDecimal (str[0]);
BigDecimal bottom= new BigDecimal (str[1]);
BigDeimal result = top.divide (bottom);
请参见
BigDecimal
对分数没有帮助<代码>新的BigDecimal(1).除法(新的BigDecimal(3))代码>抛出异常。是的,读取JavaDoc,并考虑使用舍入模式。我将试图向OP说明,要求标准java类不是一个好主意。