C++ 搜索向量中的对象

我试图在我的代码中找到一种方法来搜索我使用的向量中的对象。我已经将信息推回到不同的向量中，我知道显示信息的大小。我希望用户能够输入银行账号，如果正确，则显示其他向量的内容

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

using namespace std;

//declaring four vectors
std::vector<string>names;
std::vector<string>address;
std::vector<int>age;
std::vector<double>accountnumber;
//forward declaration of functions
void namesInput ();
void addressInput ();
void ageInput ();
void accountnumberInput ();


int main()
{
    //variable for switch statement
    int choice;
    system("title HSBC Online Banking");
    system("color B6");
    cout << "Please select from the following options" << endl;
    cout << "----------------------------------------" << endl;
    cout << "1. Enter profile " << endl;
    cout << "2. Search for client " << endl;
    cout << "3. Exit" << endl;
    cin >> choice;
    switch(choice)
    {
    case 1:
        //calling functions for first switch case
        namesInput ();
        addressInput ();
        ageInput ();
        accountnumberInput ();
        system("cls");
        break;
    case 2:
        break;
    case 3:
        system("exit");
        break;

    }


    return 0;
}

void namesInput ()
{
    system("cls");
    for (int i = 1; i <= 3; i++)
    {
       string temp;//variable to give to vector
       cout<<"Enter " << i << " first, middle and last names : ";
       cin>>temp;
       names.push_back(temp);//push back into vector
    }

}

void addressInput ()
{
    system ("cls");
    for (int i = 1; i <= 3; i++)
    {
       string temp;//variable to give to vector
       cout<<"Enter " << i << " House Number, Street, Postcode : ";
       cin>>temp;
       address.push_back(temp);//push back into vector
    }


}

void ageInput ()
{
    system ("cls");
    for (int i = 1; i <= 3; i++)
    {
       int temp;//variable to give to vector
       cout<<"Enter " << i << " Day, Month, Year : ";
       cin>>temp;
       age.push_back(temp);//push back into vector
    }


}

void accountnumberInput ()
{
    system ("cls");
    for (int i = 1; i <= 1; i++)
    {
       int temp;//variable to give to vector
       cout<<"Enter " << i << " Account Number ";
       cin>>temp;
       accountnumber.push_back(temp);//push back into vector
    }
    main ();
}

void findClient ()
{
    cout << "To find a client please enter their account number" << endl;



}

一旦找到了找到的帐户的迭代器，就可以使用简单的指针/迭代器算法（如-accountNumbers.begin）从中获取基于向量0的索引

然后，给定此索引，您可以访问其他向量中的相应项

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

using namespace std;

//declaring four vectors
std::vector<string>names;
std::vector<string>address;
std::vector<int>age;
std::vector<double>accountnumber;
//forward declaration of functions
void namesInput ();
void addressInput ();
void ageInput ();
void accountnumberInput ();


int main()
{
    //variable for switch statement
    int choice;
    system("title HSBC Online Banking");
    system("color B6");
    cout << "Please select from the following options" << endl;
    cout << "----------------------------------------" << endl;
    cout << "1. Enter profile " << endl;
    cout << "2. Search for client " << endl;
    cout << "3. Exit" << endl;
    cin >> choice;
    switch(choice)
    {
    case 1:
        //calling functions for first switch case
        namesInput ();
        addressInput ();
        ageInput ();
        accountnumberInput ();
        system("cls");
        break;
    case 2:
        break;
    case 3:
        system("exit");
        break;

    }


    return 0;
}

void namesInput ()
{
    system("cls");
    for (int i = 1; i <= 3; i++)
    {
       string temp;//variable to give to vector
       cout<<"Enter " << i << " first, middle and last names : ";
       cin>>temp;
       names.push_back(temp);//push back into vector
    }

}

void addressInput ()
{
    system ("cls");
    for (int i = 1; i <= 3; i++)
    {
       string temp;//variable to give to vector
       cout<<"Enter " << i << " House Number, Street, Postcode : ";
       cin>>temp;
       address.push_back(temp);//push back into vector
    }


}

void ageInput ()
{
    system ("cls");
    for (int i = 1; i <= 3; i++)
    {
       int temp;//variable to give to vector
       cout<<"Enter " << i << " Day, Month, Year : ";
       cin>>temp;
       age.push_back(temp);//push back into vector
    }


}

void accountnumberInput ()
{
    system ("cls");
    for (int i = 1; i <= 1; i++)
    {
       int temp;//variable to give to vector
       cout<<"Enter " << i << " Account Number ";
       cin>>temp;
       accountnumber.push_back(temp);//push back into vector
    }
    main ();
}

void findClient ()
{
    cout << "To find a client please enter their account number" << endl;



}

---

但是，从面向对象的设计角度来看，我更喜欢为accounts定义一个类，包含几个字段，如account number、name、address等，并且具有一个向量，而不是单个account属性的多个向量。

但是，根据您的代码，我建议您重新查看代码的某些部分，您只需执行以下操作：

无效查找帐户{ 系统cls；

---

对于int i=1；i std:：find可能会有帮助。您应该使用银行账户向量。否则，将很难处理名称、地址等各个向量之间的关系。顺便说一句，如果您按精确值搜索，您可能会对accountnumber的双精度有更大的问题。@harper那么我可以输入所有不同的信息吗从其他向量转换为一个向量？我以前曾想过，但不确定这是否可行。@您可以使用结构的向量，其中结构包含以前在单独向量中存在的所有项。我对结构类型名称的建议是account。

auto it = find(accountNumbers.begin(), accountNumbers.end(),
               accountNumberToFind);

if (it != accountNumbers.end())
{ 
    ... Found, process it ...
}