// count algorithm example #include 
     
       #include 
      
        #include 
       
         using namespace std; //count 他查找一个元素出现的次数 int main () {
    int mycount; // counting elements in array:   int myints[] = {
    10,20,30,30,20,10,10,20};   // 8 elements   mycount = (int) count (myints, myints+8, 10);   cout << "10 appears " << mycount << " times.\n"; // counting elements in container:   vector
        
          myvector (myints, myints+8);   mycount = (int) count (myvector.begin(), myvector.end(), 20);   cout << "20 appears " << mycount  << " times.\n"; return 0; }