我一直在跟随Codecademy的课程学习C ++。我来到最后一个项目，我学会了制作像hangman一样的程序。我想添加一个单词列表，程序在每次运行程序时都会从中选择一个新单词。 （第5行）
#include "ufo.hpp"
int main() {
srand (time(NULL));
std::cout << "=============\n";
std::cout << "UFO: The Game\n";
std::cout << "=============\n";
std::cout << "Instructions: save your friend from alien\nabduction by guessing the letters in the\ncodeword.\n";
for (int i = 0; i < codeword.size(); i++) {
answer.append("_");
}
while (answer != codeword && misses <= 6) {
take_turn();
}
if (answer == codeword) {
std::cout << "Hooray! You saved the person and earned a medal of honor!\n";
} else {
std::cout << "Oh no! The UFO just flew away with another person!\n";
std::cout << "The codeword was: " << codeword << "\n";
}
return 0;
}
在上面的代码中，我在srand(time(NULL))函数中使用了main。 rand_number变量可以在以下标题中找到:(第11行）
#include <iostream>
#include <vector>
#include <stdlib.h>
#include <time.h>
void display(int misses);
// Declare variables
std::vector<std::string> codewords = {"camera", "computer", "table", "desk", "bed", "chair", "drawer", "button", "elephant", "mouse", "printer", "soap", "toothbrush", "pillow", "curtain", "wall", "roof", "poster", "grasland", "woodpecker", "jacket", "trousers", "waterfall", "softdrink", "laundry"};
int rand_number = rand() % codewords.size();
std::string codeword = codewords[rand_number];
std::string answer;
int misses = 0;
std::vector<char> incorrect;
bool guess = false;
char letter;
// Define take_turn()
void take_turn() {
display(misses);
std::cout << "Please enter your guess: ";
std::cin >> letter;
for (int i = 0; i < codeword.size(); i++) {
if (letter == codeword[i]) {
answer[i] = letter;
guess = true;
}
}
if (guess) {
std::cout << "Correct!\n";
} else {
std::cout << "Incorrect! The tractor beam pulls the person in further.\n";
incorrect.push_back(letter);
misses++;
}
std::cout << "==========================\n";
std::cout << "Incorrect Guesses:\n";
for (int i = 0; i < incorrect.size(); i++) {
std::cout << incorrect[i] << " ";
}
std::cout << "\nCodeword:\n";
for (int i = 0; i < answer.size(); i++) {
std::cout << answer[i] << " ";
}
std::cout << "\n";
guess = false;
}
void display(int misses) {
if (misses == 0 || misses == 1) {
std::cout << " . \n";
std::cout << " | \n";
std::cout << " .-\"^\"-. \n";
std::cout << " /_....._\\ \n";
std::cout << " .-\"` `\"-. \n";
std::cout << " ( ooo ooo ooo ) \n";
std::cout << " '-.,_________,.-' ,-----------. \n";
std::cout << " / \\ ( Send help! ) \n";
std::cout << " / 0 \\ / `-----------' \n";
std::cout << " / --|-- \\ / \n";
std::cout << " / | \\ \n";
std::cout << " / / \\ \\ \n";
std::cout << " / \\ \n";
} else if (misses == 2) {
std::cout << " . \n";
std::cout << " | \n";
std::cout << " .-\"^\"-. \n";
std::cout << " /_....._\\ \n";
std::cout << " .-\"` `\"-. \n";
std::cout << " ( ooo ooo ooo ) \n";
std::cout << " '-.,_________,.-' ,-----------. \n";
std::cout << " / 0 \\ ( Send help! ) \n";
std::cout << " / --|-- \\ / `-----------' \n";
std::cout << " / | \\ / \n";
std::cout << " / / \\ \\ \n";
std::cout << " / \\ \n";
std::cout << " / \\ \n";
} else if (misses == 3) {
std::cout << " . \n";
std::cout << " | \n";
std::cout << " .-\"^\"-. \n";
std::cout << " /_....._\\ \n";
std::cout << " .-\"` `\"-. \n";
std::cout << " ( ooo ooo ooo ) \n";
std::cout << " '-.,_________,.-' ,-----------. \n";
std::cout << " /--|--\\ ( Send help! ) \n";
std::cout << " / | \\ / `-----------' \n";
std::cout << " / / \\ \\ / \n";
std::cout << " / \\ \n";
std::cout << " / \\ \n";
std::cout << " / \\ \n";
} else if (misses == 4) {
std::cout << " . \n";
std::cout << " | \n";
std::cout << " .-\"^\"-. \n";
std::cout << " /_....._\\ \n";
std::cout << " .-\"` `\"-. \n";
std::cout << " ( ooo ooo ooo ) \n";
std::cout << " '-.,_________,.-' ,-----------. \n";
std::cout << " / | \\ ( Send help! ) \n";
std::cout << " / / \\ \\ / `-----------' \n";
std::cout << " / \\ / \n";
std::cout << " / \\ \n";
std::cout << " / \\ \n";
std::cout << " / \\ \n";
} else if (misses == 5) {
std::cout << " . \n";
std::cout << " | \n";
std::cout << " .-\"^\"-. \n";
std::cout << " /_....._\\ \n";
std::cout << " .-\"` `\"-. \n";
std::cout << " ( ooo ooo ooo ) \n";
std::cout << " '-.,_________,.-' ,-----------. \n";
std::cout << " / / \\ \\ ( Send help! )\n";
std::cout << " / \\ / `-----------' \n";
std::cout << " / \\ / \n";
std::cout << " / \\ \n";
std::cout << " / \\ \n";
std::cout << " / \\ \n";
} else if (misses == 6) {
std::cout << " . \n";
std::cout << " | \n";
std::cout << " .-\"^\"-. \n";
std::cout << " /_....._\\ \n";
std::cout << " .-\"` `\"-. \n";
std::cout << " ( ooo ooo ooo ) \n";
std::cout << " '-.,_________,.-' ,-----------. \n";
std::cout << " / \\ ( Send help! ) \n";
std::cout << " / \\ / `-----------' \n";
std::cout << " / \\ / \n";
std::cout << " / \\ \n";
std::cout << " / \\ \n";
std::cout << " / \\ \n";
}
}
我没有编写太长时间，所以总是欢迎提示
这是一个时间问题。标头中的随机数表达式在main函数中的随机数生成器播种代码之前执行。像这样更改你的代码
// header
int rand_number;
std::string codeword;
// source
int main() {
srand (time(NULL));
rand_number = rand() % codewords.size();
codeword = codewords[rand_number];
现在，在随机数生成器播种后生成随机数。
PS为什么take_turn和display在你的头文件中起作用？函数（除非它们是内联的）应放在源文件中。