我为联盟编写了一个简单的程序，可以生成随机角色（AP，AD，混合，坦克），车道和冠军。你可以在这里看到代码：
#include <iostream>
#include <string>
#include <random>
#include <ctime>
using namespace std;
int main()
{
mt19937 RNG(time(0));
uniform_int_distribution<int> championRoll(1, 128);
uniform_int_distribution<int> roleRoll(1, 4);
uniform_int_distribution<int> laneRoll(1, 5);
int iChampion, iRole, iLane;
string Champion, Role, Lane;
iChampion = championRoll(RNG);
iRole = roleRoll(RNG);
iLane = laneRoll(RNG);
switch (iChampion)
{
case 1: Champion = "Aatrox"; break;
case 2: Champion = "Ahri"; break;
case 3: Champion = "Akali"; break;
case 4: Champion = "Alistar"; break;
case 5: Champion = "Amumu"; break;
case 6: Champion = "Anivia"; break;
case 7: Champion = "Annie"; break;
case 8: Champion = "Ashe"; break;
case 9: Champion = "Azir"; break;
case 10: Champion = "Bard"; break;
case 11: Champion = "Blitzcrank"; break;
case 12: Champion = "Brand"; break;
case 13: Champion = "Braum"; break;
case 14: Champion = "Caitlyn"; break;
case 15: Champion = "Cassiopeia"; break;
case 16: Champion = "Cho'Gath"; break;
case 17: Champion = "Corki"; break;
case 18: Champion = "Darius"; break;
case 19: Champion = "Diana"; break;
case 20: Champion = "Dr. Mundo"; break;
case 21: Champion = "Draven"; break;
case 22: Champion = "Ekko"; break;
case 23: Champion = "Elise"; break;
case 24: Champion = "Evelynn"; break;
case 25: Champion = "Ezreal"; break;
case 26: Champion = "Fiddlesticks"; break;
case 27: Champion = "Fiora"; break;
case 28: Champion = "Fizz"; break;
case 29: Champion = "Galio"; break;
case 30: Champion = "Gangplank"; break;
case 31: Champion = "Garen"; break;
case 32: Champion = "Gnar"; break;
case 33: Champion = "Gragas"; break;
case 34: Champion = "Graves"; break;
case 35: Champion = "Hecarim"; break;
case 36: Champion = "Heimerdinger"; break;
case 37: Champion = "Illaoi"; break;
case 38: Champion = "Irelia"; break;
case 39: Champion = "Janna"; break;
case 40: Champion = "Jarvan IV"; break;
case 41: Champion = "Jax"; break;
case 42: Champion = "Jayce"; break;
case 43: Champion = "Jinx"; break;
case 44: Champion = "Kalista"; break;
case 45: Champion = "Karma"; break;
case 46: Champion = "Karthus"; break;
case 47: Champion = "Kassadin"; break;
case 48: Champion = "Katarina"; break;
case 49: Champion = "Kayle"; break;
case 50: Champion = "Kennen"; break;
case 51: Champion = "Kha'zix"; break;
case 52: Champion = "Kindred"; break;
case 53: Champion = "Kog'Maw"; break;
case 54: Champion = "Leblanc"; break;
case 55: Champion = "Lee Sin"; break;
case 56: Champion = "Leona"; break;
case 57: Champion = "Lissandra"; break;
case 58: Champion = "Lucian"; break;
case 59: Champion = "Lulu"; break;
case 60: Champion = "Lux"; break;
case 61: Champion = "Malphite"; break;
case 62: Champion = "Malzahar"; break;
case 63: Champion = "Maokai"; break;
case 64: Champion = "Master Yi"; break;
case 65: Champion = "Miss Fortune"; break;
case 66: Champion = "Mordekaiser"; break;
case 67: Champion = "Morgana"; break;
case 68: Champion = "Nami"; break;
case 69: Champion = "Nasus"; break;
case 70: Champion = "Nautilus"; break;
case 71: Champion = "Nidalee"; break;
case 72: Champion = "Nocturne"; break;
case 73: Champion = "Nunu"; break;
case 74: Champion = "Olaf"; break;
case 75: Champion = "Orianna"; break;
case 76: Champion = "Pantheon"; break;
case 77: Champion = "Poppy"; break;
case 78: Champion = "Quinn"; break;
case 79: Champion = "Rammus"; break;
case 80: Champion = "Rek'Sai"; break;
case 81: Champion = "Renekton"; break;
case 82: Champion = "Rengar"; break;
case 83: Champion = "Riven"; break;
case 84: Champion = "Rumble"; break;
case 85: Champion = "Ryze"; break;
case 86: Champion = "Sejuani"; break;
case 87: Champion = "Shaco"; break;
case 88: Champion = "Shen"; break;
case 89: Champion = "Shyvana"; break;
case 90: Champion = "Singed"; break;
case 91: Champion = "Sion"; break;
case 92: Champion = "Sivir"; break;
case 93: Champion = "Skarner"; break;
case 94: Champion = "Sona"; break;
case 95: Champion = "Soraka"; break;
case 96: Champion = "Swain"; break;
case 97: Champion = "Syndra"; break;
case 98: Champion = "Tahm Kench"; break;
case 99: Champion = "Talon"; break;
case 100: Champion = "Taric"; break;
case 101: Champion = "Teemo"; break;
case 102: Champion = "Thresh"; break;
case 103: Champion = "Tristana"; break;
case 104: Champion = "Trundle"; break;
case 105: Champion = "Tryndamere"; break;
case 106: Champion = "Twisted Fate"; break;
case 107: Champion = "Twitch"; break;
case 108: Champion = "Udyr"; break;
case 109: Champion = "Urgot"; break;
case 110: Champion = "Varus"; break;
case 111: Champion = "Vayne"; break;
case 112: Champion = "Veigar"; break;
case 113: Champion = "Vel'Koz"; break;
case 114: Champion = "Vi"; break;
case 115: Champion = "Viktor"; break;
case 116: Champion = "Vladimir"; break;
case 117: Champion = "Volibear"; break;
case 118: Champion = "Warwick"; break;
case 119: Champion = "Wukong"; break;
case 120: Champion = "Xerath"; break;
case 121: Champion = "Xin Zhao"; break;
case 122: Champion = "Yasuo"; break;
case 123: Champion = "Yorick"; break;
case 124: Champion = "Zac"; break;
case 125: Champion = "Zed"; break;
case 126: Champion = "Ziggs"; break;
case 127: Champion = "Zilean"; break;
case 128: Champion = "Zyra"; break;
}
switch (iRole)
{
case 1: Role = "AD"; break;
case 2: Role = "AP"; break;
case 3: Role = "Hybrid"; break;
case 4: Role = "Tank"; break;
}
switch (iLane)
{
case 1: Lane = "Top"; break;
case 2: Lane = "Mid"; break;
case 3: Lane = "ADC"; break;
case 4: Lane = "Support"; break;
case 5: Lane = "Jungle"; break;
}
cout << Role << " " << Champion << " " << Lane << endl;
system("PAUSE");
return 0;
}
我想要做的是让这个程序一次生成5行。但是这有两个问题。
第一个问题是我需要冠军和车道成为独特的价值观，因为你不能在同一个游戏中拥有两个。所以我不确定该怎么做。有没有办法将一组整数放入数组中，如果有重复的数字，交换删除它们并立即生成新的？这只是猜测。
第二个问题是我的种子是时间，所以有没有办法让程序每次生成一行时等待1秒？
答案 0 :(得分：3)
第一个问题是我需要冠军和车道成为独特的价值观，因为你不能在同一个游戏中拥有两个。
你可以通过创建一个包含所有必需通道的数组/向量来解决这个问题，然后将其改组：
std::vector<lane> lanes{lane::top, lane::bot, lane::jng, lane::mid};
std::shuffle(std::begin(lanes), std::end(lanes), RNG);
之后，您可以迭代lanes向量，并保证您将以随机方式获得所有通道。
我建议创建一个帮助器make_shuffled_vector<T>(...)函数以避免样板。
第二个问题是我的种子是时间，所以有没有办法让程序每次生成一行等待1秒钟？
您应该使用std::random_device。
std::random_device rd;
std::mt19937_64 gen(rd());
如果有硬件支持，则使用它生成种子。否则，默认种子是实现定义。
我建议您阅读this article以获取有关默认种子的更多信息。
可选地，您可以避免针对此问题的繁琐且容易出错的switch构造。
这里有一种干净利落地解决方法，可以使用可变参数模板：
template<typename T, typename... Ts>
auto make_shuffled_vector(Ts... xs)
{
// Note: perfect-forwarding intentionally omitted to
// enhance example readability.
std::vector<T> v{xs...};
std::shuffle(std::begin(v), std::end(v), RNG);
return v;
}
auto champions = make_shuffled_vector<string>(
"Vayne (best champion.)", "Caitlyn", "Lulu",
"Teemo (Satan)", ...);
auto lanes = make_shuffled_vector<string>(
"mid", "top", "bot(adc)", "bot(sup)", "jng");
// You may want roles to be duplicated (not shuffled).
// This is just an example.
auto roles = make_shuffled_vector<string>(
"ad", "ap", "tank", "hybrid");
// Get the `i-th` element from `vec`, cycling if end is reached.
auto get_cycled = [](const auto& vec, auto i)
{
return vec[i % vec.size()];
};
// Get 5 champions:
for(int i = 0; i < 5; ++i)
{
std::cout
<< lanes[i] // Assumes there always are >=5 lanes.
<< champions[i] // Assumes there always are >=5 champions.
<< get_cycled(roles, i)
<< "\n";
}
如果你想沿着这条路走下去，你可以找到a real implementation of make_vector here，它可以用来实现make_shuffled_vector。