C++ 11 標準 Lambda運算式

來源:互聯網
上載者:User

  C++ 11標準新增加了Lambda運算式,以後小函數可以直接內嵌Lambda運算式搞定了。例如排序,我們以前要這麼寫:

#include <iostream>#include <cstdlib>#include <algorithm>bool compare( const int & a, const int & b ){    return a < b;}using namespace std;int main ( ){    int a[10] = {5,1,2,3,6,9,8,2,3,6};    sort( a, a+9, compare );    for ( int i = 0 ; i < 9 ; i ++ )        cout << a[i] << endl;    return EXIT_SUCCESS;}

  用C++ 11標準的Lambda運算式,這麼寫就行了:

#include <iostream>#include <cstdlib>#include <algorithm>using namespace std;int main ( ){    int a[10] = {5,1,2,3,6,9,8,2,3,6};    sort( a, a+9, []( const int & a, const int & b )->bool{ return a < b; } );    for ( int i = 0 ; i < 9 ; i ++ )        cout << a[i] << endl;    return EXIT_SUCCESS;}
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