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  • c++ 使用类生成随机数

    // generate algorithm example
    #include <iostream>     // cout
    #include <algorithm>    // generate
    #include <vector>       // vector
    #include <ctime>        // time
    #include <cstdlib>      // rand, srand
    using namespace std;
    // function generator:
    int RandomNumber () { return (rand()%100); }
    
    // class generator:
    struct c_unique {
      int current;
      c_unique() {current=0;}
      int operator()() {return ++current;}
    } UniqueNumber;
    
    int main () {
      srand ( unsigned ( time(0) ) );
    
      vector<int> myvector (8);
    
      generate (myvector.begin(), myvector.end(), RandomNumber);
    
      cout << "myvector contains:";
      for (vector<int>::iterator it=myvector.begin(); it!=myvector.end(); ++it)
        cout << ' ' << *it;
      cout << '
    ';
    
      generate (myvector.begin(), myvector.end(), UniqueNumber);
    
      cout << "myvector contains:";
      for (vector<int>::iterator it=myvector.begin(); it!=myvector.end(); ++it)
        cout << ' ' << *it;
      cout << '
    ';
     
      return 0;
    }

    输出

    myvector contains: 79 85 70 70 77 30 63 55
    myvector contains: 1 2 3 4 5 6 7 8
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  • 原文地址:https://www.cnblogs.com/sea-stream/p/10891838.html
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