sort模板有两种: --------------------------------------------------------------------- template<class RanIt> void sort(RanIt fist, RanIt last); template<class RanIt, class Pred> void sort(RanIt fist, RanIt last, Pred pr); --------------------------------------------------------------------- 第一种模板,sort重排[first,last)之间的元素,产生一个按operate<排列的序列。sort将序列中的元素以升序方式排列。 第二种模板和前一个的行为相似,不过它用pr(X,Y)代替了operate<(x,y)。
例子: ------------------------------ // tmp1.cpp : Defines the entry point for the console application. //
#include "stdafx.h" #include <vector> #include <algorithm> // Include algorithms #include <iostream>
using namespace std;
bool pr(int s1, int s2) { return s1>s2; }
int main(int argc, char* argv[]) { vector<int> vec; vector<int>::iterator i;
vec.push_back (10); vec.push_back (3); vec.push_back (7); sort(vec.begin(), vec.end(),pr); // Sort the vector
for (i = vec.begin(); i != vec.end(); i++) { cout<<*i<<endl; }
return 0; }
例子2:
--------------------------------------------------------------------------------------
// tmp1.cpp : Defines the entry point for the console application. //
#include "stdafx.h" #include <vector> #include <algorithm> // Include algorithms #include <iostream> #include <string>
using namespace std;
class myless {
public: bool operator()( const int &a, const int &b) { return a < b; } };
int main(int argc, char* argv[]) { vector<int> vec; vector<int>::iterator i; vec.push_back (10); vec.push_back (3); vec.push_back (7); sort(vec.begin(), vec.end(), myless()); // Sort the vector
for (i = vec.begin(); i != vec.end(); i++) { cout<<*i<<endl; }
return 0; }
例子3:
------------------------------------------------------------------------
// tmp1.cpp : Defines the entry point for the console application. //
#include "stdafx.h" #include <vector> #include <algorithm> // Include algorithms #include <iostream> #include <string>
using namespace std;
typedef struct { string first; string last; }NAME;
bool sortbyfirst(const NAME& n1, const NAME& n2) { return (n1.first<n2.first); }
bool sortbylast(const NAME& n1, const NAME& n2) { return (n1.last<n2.last); }
int main(int argc, char* argv[]) { vector<NAME> contacts; vector<NAME>::iterator j; NAME tmp; tmp.first = "liu"; tmp.last = "bei"; contacts.push_back(tmp);
tmp.first = "zhao"; tmp.last = "yun"; contacts.push_back(tmp);
tmp.first = "gun"; tmp.last = "yu"; contacts.push_back(tmp);
tmp.first = "zhang"; tmp.last = "fei"; contacts.push_back(tmp);
cout<<"by first:"<<endl;
sort(contacts.begin(), contacts.end(), sortbyfirst);
for(j=contacts.begin(); j!= contacts.end(); j++) { cout<<j->first<<" "<<j->last<<endl; }
cout<<"by last:"<<endl;
sort(contacts.begin(), contacts.end(), sortbylast);
for(j=contacts.begin(); j!= contacts.end(); j++) { cout<<j->first<<" "<<j->last<<endl; } return 0; }

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