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C++ 第一次使用函数

转载 作者:行者123 更新时间:2023-11-28 07:39:13 25 4
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如标题所述,我是第一次使用 Functions,但很难将它们应用到刽子手游戏中。根据我有限的知识,我假设我的变量范围超出了函数调用的范围。考虑到我完全是根据一本书来工作,我觉得我碰壁了。我在想可能会使用全局变量,但话又说回来,我正在研究的章节也只给了我对它们的有限理解。我也有问题 srand(time(0));出于某种原因。任何帮助将不胜感激,并提前致谢。

// HangMan Game
// With Functions

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <ctime>
#include <cctype>

using namespace std;

char playerGuess();
char guessInWord();

int main()
{
//setup
const int MAX_WRONG = 8;//max wrong will be set at 8

vector<string> words; //collection of possible words to guess
words.push_back ("DAFTPUNK");
words.push_back ("ELSALVADOR");
words.push_back ("HIPHOP");

srand(time(0));
random_shuffle(words.begin(), words.end());
const string THE_WORD = words[0]; //word to guess
int wrong = 0; //number of incorrect guesses
string soFar(THE_WORD.size(), '-'); //word guessed so far
string used = ""; //letters already guessed

cout << "Welcome to Hangmam. Good luck!\n";

//main loop
while ((wrong < MAX_WRONG) && (soFar != THE_WORD))
{
cout << "\nYou have " << (MAX_WRONG - wrong) << " incorrect guesses left.\n";
cout << "\nYou've used the following letters:\n" << used << endl;
cout << "\nSo far, the word is:\n" << soFar << endl;

char guess = playerGuess(); //call to function 1

used += guess;

guessInWord(); //call to function 2
}

//shut down
if(wrong == MAX_WRONG)
cout << "\nYou've been hanged!";
else
cout << "\nYou guessed it!";

cout << "\nThe Word was " << THE_WORD << endl;

return 0;
}

//function Definitions 1
char playerGuess()
{
char letter;
cout << "\n\nEnter your guess: ";
cin >> letter;
letter = toupper(letter); //makes uppercase of letter
while (used.find(letter) != string::npos)
{
cout <<"\nYou've already guessed " << letter << endl;
cout <<"Enter your guess: ";
cin >> letter;
letter = toupper(letter);
}
return letter;
}

//function Definitions 2
void guessInWord()
{
if (THE_WORD.find(guess) != string::npos)
{
cout << "That's right! " << guess << " is in the word.\n";

//update soFar to Include newly guessed letter
for (int i = 0; i < THE_WORD.length(); ++i)
if (THE_WORD[i] == guess)
soFar[i] = guess;
}
else
{
cout << "Sorry, " << guess << " isn't in the word.\n";
++wrong;
}
}

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