count http://www.cplusplus.com/reference/algorithm/count/
2011-07-29 22:19
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// count algorithm example #include <iostream> #include <algorithm> #include <vector> 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<int> myvector (myints, myints+8); mycount = (int) count (myvector.begin(), myvector.end(), 20); cout << "20 appears " << mycount << " times.\n"; return 0; }
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