和野兔模拟终止问题

Tortoise and Hare simulation terminating issue

本文关键字：终止 问题 模拟      更新时间：2023-10-16
#include<iostream>
#include<cstdlib>
#include<time.h>
#include<ctime>
#include<iomanip>
using namespace std;
const int End=70; //constant fixed integer for the entire game.
void MoveTurtoise (int *); 
void MoveHare (int *);
void PrintPosition (int *, int*);

int main()
{
int Tortoise = 1;
int Hare = 1;
int Time = 0;
srand(time(0));
cout<<"BANG!!!!!n"
    <<"AND THEY'RE OFF !!!!!n";
while( Tortoise != End && Hare != End )
{
    srand(time(0));
    MoveTurtoise (&Tortoise);
    MoveHare (&Hare);
    PrintPosition (&Tortoise,&Hare);
    Time++;
}
if (Tortoise==Hare)
        cout<<"It's a tie."<<endl;
    else if (Tortoise>Hare)
        cout<<"Tortoise wins."<<endl;
    else if (Hare>Tortoise)
        cout<<"Hare wins."<<endl;
system("PAUSE");
return 0;
}
void MoveTurtoise (int *Tortoise)
{
srand(time(0));
int p = 1+ rand()%10; // 1 <= i <= 10
if (1<=p && p<=5) //Fast plod
    Tortoise+=3; //3 squares right
else if (p>=6 && p<=7) //Slip
    Tortoise-=6;//6 squares left
else //Slow plod
    ++Tortoise; //1 square right
if (*Tortoise<1)
    *Tortoise=1;

}
void MoveHare (int *Hare)
{
srand(time(0));
int p = 1+ rand()%10; // 1 <= p <= 10
if (1<= p && p<=2); //Sleep
                    //No move
else if (p>=3 && p<=4) //Big hop
    Hare+=9;//9 squares right
else if (p==5) //Big Slip
    Hare-=12;// 12 squares left
else if (p>=6 && p<=8) // Small hop
    ++Hare;// 1 square right
else if (p>=9 && p<=10)// Small Slip
    Hare-=2; // 2 squares left
if (*Hare<1)
    *Hare=1;

}
void PrintPosition (int *Tortoise, int *Hare)
{
if (Tortoise==Hare)
    cout<<"OUCH!!!"<<endl;
else if (Tortoise<Hare)
    {
    cout<<setw(*Tortoise)<<"T"<<endl;
    cout<<setw(Hare-Tortoise)<<"H"<<endl;
    }
else if (Hare<Tortoise)
{
    cout<<setw(Tortoise-Hare)<<"T"<<endl;
    cout<<setw(*Hare)<<"H"<<endl;
}


}

大家好。我刚刚在C++中为龟兔模拟游戏制作了一个代码。我在查找导致我的程序"不"终止的原因时遇到问题。它以相同的结果继续下去。我假设有一个循环错误和srand((的错误用法。但我仍然不知道...

在函数 MoveTurtoise 和 MoveHare 中，您递增的是指针而不是它们的值。

void MoveTurtoise (int *Tortoise)
{
   srand(time(0));
   int p = 1+ rand()%10; // 1 <= i <= 10
   if (1<=p && p<=5) //Fast plod
      Tortoise+=3; //3 squares right
      // This makes Tortoise point to a different location.
      // It does not change the value of what Tortoise points to.
      // Similarly for the next two clauses.
   else if (p>=6 && p<=7) //Slip
      Tortoise-=6;//6 squares left
   else //Slow plod
      ++Tortoise; //1 square right
   if (*Tortoise<1)
      *Tortoise=1;
}

您需要什么：

void MoveTurtoise (int *Tortoise)
{
   srand(time(0));
   int p = 1+ rand()%10; // 1 <= i <= 10
   if (1<=p && p<=5) //Fast plod
      (*Tortoise) += 3; //3 squares right
   else if (p>=6 && p<=7) //Slip
      (*Tortoise) -= 6;//6 squares left
   else //Slow plod
      ++(*Tortoise); //1 square right
   if (*Tortoise<1)
      *Tortoise=1;
}

MoveHare需要以类似的方式修复。

这是一个更好的解决方案。更改将参数类型更改为int&，然后代码将更像您拥有的内容。

void MoveTurtoise (int& Tortoise)
{
   srand(time(0));
   int p = 1+ rand()%10; // 1 <= i <= 10
   if (1<=p && p<=5) //Fast plod
      Tortoise+=3; //3 squares right
   else if (p>=6 && p<=7) //Slip
      Tortoise-=6;//6 squares left
   else //Slow plod
      ++Tortoise; //1 square right
   if (Tortoise<1)
      Tortoise=1;
}

此外，您对PrintPosition的实现就像参数是：

void PrintPosition (int Tortoise, int Hare);

这比你拥有的要好。改变

void PrintPosition (int *Tortoise, int *Hare);

自 

void PrintPosition (int Tortoise, int Hare);

是的，user3543568198您忘记使用 std：：setw 添加标头库;并且您在打印语句中添加了一个 else if(Hare<=Tortoise(，与 if else 相矛盾，因为 if...否则做同样的事情，但通过引用传递的代码看起来都很好，除了您的 Tortoise 函数缺少 raceEnd=....在头发和功能方面。只需将您的程序功能替换为下面的功能，它实际上就会在屏幕上移动单元......哦一定要添加常量整数 RACE_END = 70;在页眉中

void MoveTurtoise (int *Tortoise)
{
int x = 1 + rand() % 10;
// determine which move to make
if (x >= 1 && x <= 5)        // fast plod
    *Tortoise += 5;
else if (x == 9 )   // slip
    *Tortoise -= 12;
else                           // slow plod
    ++(*Tortoise);
if (*Tortoise < 1)
    *Tortoise = 1;
else if (*Tortoise > RACE_END)
    *Tortoise = RACE_END;
}

void MoveHare(int *Hare)
{
int y = 1 + rand() % 10;
/* Write statements that move hare */
// determine which move to make
if (y >= 1 && y <= 5)        // fast plod
    *Hare += 3;
else if (y == 6 || y == 7)   // slip
    *Hare -= 6;
else                           // slow plod
    ++(*Hare);
/* Write statements that test if hare is before
the starting point or has finished the race */
if (*Hare < 1)
    *Hare = 1;
else if (*Hare > RACE_END)
    *Hare = RACE_END;
}
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