C++ Primer第四版习题--3.13

//读一组数到vector对象，计算收尾配对元素的和并输出
#include <iostream>
#include <vector>

int main()
{
    std::vector<int> ivec;
    int temp, add;
    while(std::cin>>temp)
        ivec.push_back(temp);

    typedef std::vector<int>::size_type vec_type;
    vec_type flag;
    for(vec_type ix=0; ix<(ivec.size()/2); ++ix)
    {
        add = ivec[ix] + ivec[ivec.size()-ix-1];
        std::cout << add << "\t";
        if((ix+1)%6==0)
            std::cout << std::endl;
        flag=ix;
    }
    if(ivec.size()%2 != 0)
        std::cout << std::endl
                  << "The middle element do not add,it's: "
                  << ivec[flag]
                  << std::endl;
    return 0;
}

C++ Primer第四版习题--3.13

原文：http://blog.csdn.net/xumesang/article/details/45533305