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The difference and connection between RAM, ROM, memory and external memory.

on November 06, 2018

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I can't find the error of this program. Please help. Thank you.

I can't find the error of this program. Please help. Thank you. package com.java21days; import javax.swing.*; import java.net.*; import java.io.*; public class WebReader extends JFrame { JTextArea box = new JTextArea("Getting data ..."); public WebReader() { super("Get File Application"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(600, 300); JScrollPane pane = new JScrollPane(box); add(pane); setVisible(true); } void getData(String address) throws MalformedURLException { setTitle(address); URL page = new URL(address); StringBuilder text = new StringBuilder(); try { HttpURLConn...

Naughty button

/*This is a simple application that is used to display a simple panel. Have fun.*/ package coursa; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Mouse extends JFrame implements ActionListener { public Mouse() { super("Message"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(420, 220); BorderLayout border = new BorderLayout(); setLayout(border); JLabel msg = new JLabel("Click Yes to close program."); add(BorderLayout.NORTH, msg); PrankPanel prank = new PrankPanel(); prank.Yes.addActionListener(this); add(BorderLayout.CENTER, prank); setVisible(true); } @Override p...

A program for finding the results of a+b and a-b.

Time Limit: 1000/2000 MS (C/Others) Memory Limit: 65536/512 K (C/Others) Input: There are multiple sets of data, each time entering two numbers, a and b, separated by spaces, one pair of integers per line. (|a|,|b|<=2^62), |a|, |b| denote the absolute value of a, b. Output: For each pair of integers a and b, you should output the answers for a+b and a-b on one line, separated by spaces. Sample Input: 1 2 3 3 Sample Output: 3 -1 Source code： #include<stdio.h> #include<math.h> int main(void){ int a, b, result1, result2; while(scanf("%d %d", &a, &b)!=EOF){ result1 = a + b; result2 = a - b; if(fabs(a) < 2^62 & fabs(b) < 2^62){ printf("%d %d", result1, result2); } } return 0; }

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The difference and connection between RAM, ROM, memory and external memory.

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