我正在使用平面汇编器以汇编语言处理 movsb 和 movsw 指令。现在，我注意到当执行 movsb 指令时，SI 和 DI 寄存器递增 1，而 movsw 指令则使 SI 和 DI 寄存器递增 2。我有点困惑为什么？谁能给我解释一下原因。我在下面添加了我的代码以用于带有注释的说明。请帮帮我。谢谢！
使用movsb指令（平面汇编器）
cld ;clear direction flag
lea si,[val] ;the memory address of source is loaded in the source register
lea di,[v];the memory address of the destination is loaded in the destination register
mov cx,5 ; the counter basically executes for the number of characters in the array
rep movsb ; repeats the instruction for 5 times
val:
db 'A'
db 'B'
db 'C' …I've come to a point in a Go project of mine where I'd like to create multiple subclasses of a base class, and be able to operate on instances of the subclasses through a base class/interface variable (I'm using the word "class" even though the concept doesn't really exist in Go).
Here's what it might look like in C++ just to show what I mean:
#include <iostream>
using namespace std;
class Base {
public:
int x,y;
virtual void DoStuff() {}; …好吧,我刚刚完成了我的练习,并坚持如何让每个骰子滚动他们自己的随机生成的数字.该程序确实滚动随机数,只是每次你重新掷骰子时,总是滚动相同的数字.而且这个简单却又头疼的问题发生了,出于某些原因,我也有
cout << "Adding both dices up you rolled a total of: " << totalScore() << "." << endl;
我也被同学告诉我,我的faceValue是非法值,应该设置为合法值.我并没有完全明白他的意思,我确信它会在我的成绩中取得一些成绩(不是很多).
#include "stdafx.h"
#include <iostream>
#include <string>
#include <ctime>
using namespace std;
class PairOfDice
{
private:
int diceOne;
int diceTwo;
int score;
int faceVaule;
public:
PairOfDice(){
srand(time(NULL));
roll();
}
void roll(){
diceOne = (rand() % 6) + 1;
diceTwo = (rand() % 6) + 1;
setdiceOne(diceOne);
setdiceTwo(diceTwo);
}
void setdiceOne(int value){
faceVaule = value;
}
int getdiceOne(){
return faceVaule;
}
void …我是Ada编程的新手.这是我的一个程序的ADA代码,它给我一个在执行时输入一个足球传奇名称的东西列表.但是我收到以下错误.请帮帮我:
发现的一些错误是:1.Discriminants必须具有离散或Access类型2.组件"FBClubs不能在记录声明结束之前使用3.变体部分中的歧视必须是离散的第4部分."player"未定义5 ."pos"未定义.6.没有候选解释与sctuals匹配:=>在"类型播放器名称..."行调用继承操作"to_string"
with Ada.Text_Io; use Ada.Text_Io;
with Ada.Integer_Text_Io; use Ada.Integer_Text_Io;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
Procedure football_record is
type Position is (Goalkeeper,Midfielder,Forward,Defender);
type playernames is new Unbounded_String;
type FBClubs is (ACMilan,Man_United,Aresnal,ParisSt.Germain,Real_Madrid,Liverpool,Chelsea,Man_City,Lille,
Tottenham,Ajax,Juventus,Dortmund,Roma,Santos,Roma,Bayern_Munich,Inter_Milan);
type countries is (England,Argentina,Brazil,France,Italy,Portugal,Spain,Germany,Iran,Japan);
type fbplayer(player:playernames) is
record
WCAppearances:Integer;
pos:Position;
country:countries;
fbclubs:FBClubs;
case player is
when "David Beckham" =>
country:countries:=England;
WCAppearances:Integer:=3;
pos:Position:=Midfielder;
fbclubs:FBClubs:=ACMilan &"+" & Man_United &"+" & Real_Madrid &"+"& ParisSt.Germain;
when "Lionel Messi" =>
country:countries:=Argentina;
WCAppearances:Integer:=1;
pos:Position:=Forward;
fbclubs:FBClubs:=Barcelona;
.....and some other 12 players(legends)..
when others =>
country:countries:=Nil; …我正在尝试创建一个名为“exit.txt”的文件，并在其中写入一些数据。我尝试过不同的标志和模式，但这似乎不起作用。这是我正在使用的代码：
str_exit: .asciiz "/home/LinuxPc/Desktop/exit.txt"
file_write:
li $v0, 13
la $a0, str_exit
li $a1, 1
la $a2, 0
syscall
有什么办法让它发挥作用吗？谢谢 ！！
我想在 Qt 中使用 JNI 调用 Android Java 方法。有一个我无法理解的奇怪的“方法签名”参数。这是什么，我应该如何设置？
在示例中，它类似于(II)Ior (I)I。这是什么意思？
例如：
jint max = QAndroidJniObject::callStaticMethod<jint>("java/lang/Math", "max", "(II)I", a, b);
我从命令提示符处得到此错误:
bikeGame.java:9: error: cannot find symbol
String input = scanner.nextLine();
^
symbol: variable scanner
location: class bikeGame
1 error
您好,在收到上述错误时,您可以帮我修复吗？(我是java的新手,如果你能看到错误,这是我的代码)
import java.util.Scanner;
import java.io.IOException;
class bikeGame {
public static void main(String[] args){
String welcome = "Welcome to Bike Rider! You can use the commands 'faster', 'slower' and 'brakes'. Type 'start' to begin...";
String die = "You died, type 'start' to play again...";
System.out.println(welcome);
String input = scanner.nextLine();
System.out.println("You selected " + input + "? Is this correct? <true or false>"); …