c++,这是错误显示：error C2059: syntax error : 'string'，请问哪里错了？

Question

#include<iostream>
using namespace std;

class BusinessManager
{
private:
char id[10];
char name[10];
int age;
public:
BusinessManager(char s1[10],char s2[10],int s3)
{
*strcpy(id,s1);
*strcpy(name,s2);
age = s3;
cout<<"Position:BusinessManager id:"<<id<<" name:"<<name<<" age:"<<age<<"This is printed by constructor."<<endl;
}
~BusinessManager()
{
cout<<"Position:BusinessManager id:"<<id<<" name:"<<name<<" age:"<<age<<"This is printed by destructor."<<endl;
}
};

class TechnicalManager
{
private:
char id[10];
char name[10];
int age;
public:
TechnicalManager(char s1[10],char s2[10],int s3)
{
*strcpy(id,s1);
*strcpy(name,s2);
age = s3;
cout<<"Position:TechnicalManager id:"<<id<<" name:"<<name<<" age:"<<age<<"This is printed by constructor."<<endl;
}
~TechnicalManager()
{
cout<<"Position:TechnicalManager id:"<<id<<" name:"<<name<<" age:"<<age<<"This is printed by destructor."<<endl;
}
};

class Employee
{
private:
char id[10];
char name[10];
int age;
public:
Employee(char s1[10],char s2[10],int s3)
{
*strcpy(id,s1);
*strcpy(name,s2);
age = s3;
cout<<"Position:Employee id:"<<id<<" name:"<<name<<" age:"<<age<<"This is printed by constructor."<<endl;
}
~Employee()
{
cout<<"Position:TechnicalManager id:"<<id<<" name:"<<name<<" age:"<<age<<"This is printed by destructor."<<endl;
}
};

class Team
{
public:
Team();
private:
BusinessManager businessManager1("123","John",43);
TechnicalManager technicalManager1("234","Peter",42);
Employee employee1("345","James",32);
Employee employee2("456","Paul",23);
Employee employee3("567","Mary",27);
Employee employee4("678","Lily",31);
Employee employee5("789","Lucy",25);
};

int main()
{
Team team1;
return 0;
}

Answer 1

BusinessManager businessManager1("123","John",43);
TechnicalManager technicalManager1("234","Peter",42);
Employee employee1("345","James",32);
Employee employee2("456","Paul",23);
Employee employee3("567","Mary",27);
Employee employee4("678","Lily",31);
Employee employee5("789","Lucy",25);
你的这段代码有问题。因为还是在申明变量，并没有进行初始化，初始化要么放在构造函数中，或者调用特定的初始化函数，但是在申明变量的时候一定不能这样中，因为team还没有确定，怎么能够确定他的成员呢！！打个比方，没有确定母体，就确定了母体的孩子，这是不可能的

Answer 2

语法错误。要么是
string
标识不正确，要么就是string头文件没有包含进去

Answer 3

建议把char类型改为string 很久没碰c++了不确定。

Answer 4

#include <string >

Answer 5

String 应该是大写的八