STL库的for each支持

Visual Studio 的 C++ 从 VC 2005 开始支持了类似 Java, C# 的 "for each" 语法了!

以后在 C++ 的代码中我们可以写以下这样的代码了!

 

 

include "stdafx.h"
#include <vector>
#include <iostream>

int main( int argc, char* argv[] )
{
    std::vector< int > data( 5 );

    data[ 0 ] = 0;
    data[ 1 ] = 1;
    data[ 2 ] = 2;
    data[ 3 ] = 3;
    data[ 4 ] = 4;

    int total = 0;
    for ( std::vector< int >::iterator it = data.begin(); it != data.end(); it++ ) {
        int value = *it;
        total += value;
    }

    std::cout << total << std::endl;

    total = 0;
    for each ( const int i in data ) {
        total += i;
    }

    std::cout << total << std::endl;

    return 0;
}