在主要课程中获得错误请解决。 [英] Getting error in main class please resolve.

问题描述

import java.util.Scanner;
import static java.lang.Math;
public class Root1
{
	int a;
	int b;
	int c;
	double root1;
	public Root1(int a, int b, int c)
	{
		this.a=a;
		this.b=b;
		this.c=c;
	}
	public double calculateRoot1()
	{
		int d=calculateDeterminant();
		this.root1=(-b+Math.sqrt(d))/2*a;
		return root1;
	}
	public int calculateDeterminant()
	{
		int d= b*b-(4*a*c);
		return d;
	}
}
public class Root2
{
	int a;
	int b;
	int c;
	double root2;
	public Root2(int a, int b, int c)
	{
		this.a=a;
		this.b=b;
		this.c=c;
	}
	public double calculateRoot2()
	{
		int d=calculateDeterminant();
		this.root2=(-b+Math.sqrt(d))/2*a;
		return root2;
	}
	public int calculateDeterminant()
	{
		int d= b*b-(4*a*c);
		return d;
	}
}
public class RootMain
{
	Scanner input=new Scanner(System.in);
	System.out.println("Enter value of a");
	int a=input.nextInt();
	System.out.println("Enter value of b");
	int b=input.nextInt();
	System.out.println("Enter value of c");
	int c=input.nextInt();	
	public static void main(String args[])
	{
		Root1 r1= new Root1(a,b,c);
		System.out.println(r1.calculateRoot1);
		Root2 r2=new Root2(a,b,c);
		System.out.println(r1.calculateRoot2);
	}
}

我的尝试：



i我正在创建一个程序来查找二次方程的根但在主类中得到错误。请解决它。明天我必须在我的课堂上展示这个课程。

What I have tried:

i am creating a program of finding roots of quadratic equation but getting error in main class. please solve it. tomorrow i have to present this program in my class.

推荐答案

你不需要额外的课程，你的代码在 main之外方法，所以这永远不会构建，更不用说运行了。请参阅 Java™教程 [ ^ ]有关创建java程序的信息。

You do not need the extra classes in there and you have code outside your main method, so this is never going to build, let alone run. See The Java™ Tutorials[^] for information on creating a java program.

import java.util.Scanner;
import java.lang.Math;
class Root1
{
	int a;
	int b;
	int c;
	double root1;
	
	Root1(int x, int y, int z)
	{
		a=x;
		b=y;
		c=z;
	}
	public double calculateRoot1()
	{
		int d= b*b-(4*a*c);
		root1=(-b+Math.sqrt(d))/2*a;
		return root1;
	}
	
}
class Root2
{
	int a;
	int b;
	int c;
	double root2;
	Root2(int x, int y, int z)
	{
		a=x;
		b=y;
		c=z;
	}
	public double calculateRoot2()
	{
		int d= b*b-(4*a*c);
		root2=(-b-Math.sqrt(d))/2*a;
		return root2;
	}
	
}
public class RootMain
{
		
	public static void main(String args[])
	{
		Scanner input=new Scanner(System.in);
		System.out.println("Enter value of a");
		int a=input.nextInt();
		System.out.println("Enter value of b");
		int b=input.nextInt();
		System.out.println("Enter value of c");
		int c=input.nextInt();
			
		Root1 r1= new Root1(a,b,c);
		System.out.println("Value of Root 1 is:"r1.calculateRoot1());
		Root2 r2=new Root2(a,b,c);
		System.out.println("Value of Root 2 is:"r2.calculateRoot2());
	}
}

这篇关于在主要课程中获得错误请解决。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！