//---------------------------------------------------------------------------
#include <string.h>
#include <vector>
#include <algorithm>
#include <iostream.h>
#include <ctime> // std::time
#pragma hdrstop
//---------------------------------------------------------------------------
#pragma argsusedint main(int argc, char* argv[])
{
vector<string> vs;
vs.push_back(string ("aa"));
vs.push_back (string ("bb"));
vs.push_back (string ("cc"));
vs.push_back (string ("dd"));
vs.push_back (string ("ee")); std::srand(unsigned(time())); //srand函数是随机数发生器的初始化函数
random_shuffle(vs.begin(), vs.end()); /* 打乱顺序 */ for (int i = ; i< ; i++)
cout<<vs[i]<<"\n"; /* 显示打乱顺序后的元素 */ system("pause");
return ;
}
以上代码里的random_shuffle使用随机种子,不写第三个参数。
下面一个例子,使用自定义的随机种子myrandom
// random generator function:
int myrandom (int i)
{
return std::rand()%i;
}
std::vector<int> myvector; // set some values:
for (int i=; i<; ++i) myvector.push_back(i); // 1 2 3 4 5 6 7 8 9
std::srand ( unsigned ( std::time(0) ) );//srand函数是随机数发生器的初始化函数。
// using built-in random generator:
//std::random_shuffle ( myvector.begin(), myvector.end() ); // using myrandom:
std::random_shuffle ( myvector.begin(), myvector.end(), myrandom);
// print out content:
std::cout << "myvector contains:";
for (std::vector<int>::iterator it=myvector.begin(); it!=myvector.end(); ++it)
std::cout << '' << *it; std::cout << '\n';
system("pause");
return ;
}