关于c ++：函数中的向量，如何根据用户输入（字符串）创建用于删除索引的查找和擦除功能？

Vectors in functions, how to create find and erase function for deleting indexes based on user input (string)?

本问题已经有最佳答案，请猛点这里访问。

/*因此，老师为一个建立和修改电话簿的班级建立了主要和原型。现在，我几乎没有定义类函数，但是在定义他的一个原型"void erase"和"void find"时遇到了麻烦。我从void erase开始，它应该在矢量电话簿中找到一个人并将其删除，"void find"只是定位所需字符串的索引(被搜索者的姓名)。我已经列出了老师建造的主要部分，他给我们的原型，以及到目前为止我在定义它们方面所做的工作。您可以在原型和我的工作中找到我询问的两个函数。请注意，我不允许对教师的主要或原型进行任何更改。*/

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**the main:**

#include <iostream>
#include <string>
#include <vector>
#include <time.h>
#include"phonebook.h"

using namespace std;

int main()
{

vector<Person> phone_book;
string name;
int number;
int answer;

srand((int)(time(0)));

phone_book.push_back(Person("Bruin, Joe", 5556456));
phone_book.push_back(Person("Simpson, Homer", 5557471));
phone_book.push_back(Person("Duffman, Barry", 5533331));

cout <<"
";
cout <<"Your phone book contains the following names and numbers:
";

for (int i=0; i < phone_book.size(); i++)
{

phone_book[i].print();
cout <<"
";
}
cout <<"
";
answer=0;

while (answer != 8)
{
cout <<"
Choose from the following options:

";

cout <<"1) Add people to the phone book.
";
cout <<"2) Erase a person from the phone book.
";
cout <<"3) Sort the phone book.
";
cout <<"4) Shuffle the phone book.
";
cout <<"5) Reverse the phone book.
";
cout <<"6) Print the phone book.
";
cout <<"7) Look up a person in the phone book.
";
cout <<"8) Quit.

";

cin >> answer;

string clear;

getline(cin, clear);

if (answer == 1)
add_people(phone_book);
else if (answer == 2)
{
cout <<"Enter a name:";
getline(cin, name);
erase(phone_book, name);

}
else if (answer == 3)
sort(phone_book);
else if (answer == 4)
shuffle (phone_book);
else if (answer == 5)
reverse(phone_book);
else if (answer == 6)
{
cout <<"
";
cout <<"Your phone book contains the following names and numbers:
";
print(phone_book);
}
else if (answer ==7)
{
cout <<"Enter a name:";
getline(cin, name);
int number = lookup(phone_book, name);
if (number > 0)
{
cout <<"

The number for" << name <<" is:" << number <<"

";
}
else
cout << name <<" not found in the phone book.
";
}
}
return 0;
}

**the prototypes:**

#ifndef PHONEBOOK_H
#define PHONEBOOK_H
#include <string>
#include <vector>
using namespace std;

class Person
{
public:
Person();
Person(string new_name, int new_phone);
string get_name() const;
int get_phone() const;
bool operator < (Person p) const;
void print() const;

private:
string name;
int phone;
};

void add_people(vector<Person> &phone_book);
void erase(vector<Person> &phone_book, string name);
void sort(vector<Person> &phone_book);
void shuffle(vector<Person> &phone_book);
void reverse(vector<Person> &phone_book);
void print(vector<Person> &phone_book);
int lookup(const vector<Person> &phone_book, string name);
#endif

**my work so far:**

#include <iostream>
#include <string>
#include <vector>
#include <time.h>
#include"phonebook.h"

Person::Person()
{
name ="NONE";
phone = 0000000;

}
Person::Person(string new_name, int new_phone)
{
name=new_name;
phone=new_phone;
}
string Person::get_name() const
{
return name;
}
int Person::get_phone() const
{
return phone;
}
bool Person::operator < (Person p) const
{
return name < p.name;
}
void Person::print() const
{
cout << endl << name <<"" << phone;
}

void add_people(vector<Person> &phone_book)
{
cout <<"Please enter the new name:";
string s;
getline(cin, s);
cout <<"Please enter new number:";
int number;
cin >> number;
phone_book.push_back(Person(s,number));
}
void erase(vector<Person> &phone_book, string name)
{
for(int i=0; i <= phone_book.size()-1; i++)
{
phone_book[i] = phone_book[i+1];
}
}
void sort(vector<Person> &phone_book)
{
}
void shuffle(vector<Person> &phone_book)
{
}
void reverse(vector<Person> &phone_book)
{
}
void print(vector<Person> &phone_book)
{

}
int lookup(const vector<Person> &phone_book, string name)
{

}