mem_fun例子-创新互联

创新互联专注于企业营销型网站、网站重做改版、淮北网站定制设计、自适应品牌网站建设、html5、商城网站定制开发、集团公司官网建设、成都外贸网站建设公司、高端网站制作、响应式网页设计等建站业务，价格优惠性价比高，为淮北等各大城市提供网站开发制作服务。>

// functional_mem_fun.cpp
// compile with: /EHsc#include <vector>
#include<functional>
#include<algorithm>
#include<iostream>
#include<ext/functional>

using namespace std;

class StoreVals   
{
int val;
public:
    StoreVals() { val= 0; }
    StoreVals(int j) { val = j; }

bool display() { cout << val << " "; return true; }
int squareval() { val *= val; return val; }
int lessconst(int k) {val -= k; return val; }
};

int main( )
{
    vector<StoreVals *> v1;

    StoreVals sv1(5);
    v1.push_back(&sv1);
    StoreVals sv2(10);
    v1.push_back(&sv2);
    StoreVals sv3(15);
    v1.push_back(&sv3);
    StoreVals sv4(20);
    v1.push_back(&sv4);
    StoreVals sv5(25);
    v1.push_back(&sv5);

    cout<< "The original values stored are:" ;
    for_each(v1.begin(), v1.end(), mem_fun<bool, StoreVals>(&StoreVals::display));
    cout<< endl;

// Use of mem_fun calling member function through a pointer
// square each value in the vector using squareval ()    for_each(v1.begin(), v1.end(), mem_fun<int, StoreVals>(&StoreVals::squareval));   
    cout<< "The squared values are:" ;
    for_each(v1.begin(), v1.end(), mem_fun<bool, StoreVals>(&StoreVals::display));
    cout<< endl;

// Use of mem_fun1 calling member function through a pointer
// subtract 5 from each value in the vector using lessconst ()    for_each(v1.begin(), v1.end(), 
        bind2nd (__gnu_cxx::mem_fun1<int, StoreVals,int>(&StoreVals::lessconst), 5));   
    cout<< "The squared values less 5 are:" ;
    for_each(v1.begin(), v1.end(), mem_fun<bool, StoreVals>(&StoreVals::display));
    cout<< endl;
}

分享名称：mem_fun例子-创新互联
文章路径：https://www.cdcxhl.com/article44/cceoee.html

成都网站建设公司_创新互联，为您提供企业网站制作、App开发、企业建站、网站设计公司、域名注册、外贸建站

声明：本网站发布的内容（图片、视频和文字）以用户投稿、用户转载内容为主，如果涉及侵权请尽快告知，我们将会在第一时间删除。文章观点不代表本网站立场，如需处理请联系客服。电话：028-86922220；邮箱：631063699@qq.com。内容未经允许不得转载，或转载时需注明来源：创新互联

猜你还喜欢下面的内容