frogwalk.cpp

来自「C++&datastructure书籍源码,以前外教提供现在与大家共享」· C++ 代码 · 共 29 行

#include <iostream>
using namespace std;
#include "dice.h"
#include "prompt.h"

// simulate one-dimensional random walk
// Owen Astrachan, 8/13/94, modified 5/1/99

int main()
{
    int numSteps = PromptRange("enter # of steps",0,20000);
    int position = 0;         // "frog" starts at position 0
    Dice die(2);              // used for "coin flipping"
    int k;
    for(k=0; k < numSteps; k++)
    {   switch (die.Roll())
        {
          case 1:
            position++;    // step to the right
            break;
          case 2:
            position--;    // step to the left
            break;
        }
    }
    cout << "final position = " << position << endl;
    return 0;
}