代码如下：

teacher.cpp的代码：

#include<iostream>
#include<string>
#include"teacher.h"

using namespace std;

void teacher::setName(string name)
{m_strName=name;}
string teacher::getName()
{return m_strName;}

void teacher::setAge(int age)
{m_iAge=age;}
int teacher::getAge()
{return m_iAge;}

teacher::teacher(){
   m_strName="jim";
   m_iAge=114;
   cout<<"teacher()"<<endl;
 
}
teacher::teacher(string name,int age);
int main(){

 teacher t;
 t.setName("kongzi");
 cout<<t.getName()<<endl;
 t.setAge(111);
 cout<<t.getAge()<<endl;

 system("pause");
 return 0;

}

这是·teacher.h的代码：

#include<string>

using namespace std;
class teacher{

   public:
    teacher();
    teacher(string name,int age);
    void setName(string name);
    string getName();
    void setAge(int age);
    int getAge();
   private:
    string(m_strName);
    int(m_iAge);

};

这是demo.cpp的代码：

#include<iostream>
#include<string>
#include"teacher.h"

using namespace std;

int main(void){
 teacher t1;
 teacher t2("merry", 12);
    cout<<t1.getName()<<t1.getAge()<<endl;
 cout<<t2.getName()<<t2.getAge()<<endl;
}

按照这样的代码运行会报如下错误：1>d:\vs 2010\project\test8\test8\teacher.cpp(23): error C2761: “{ctor}”: 不允许成员函数重新声明

就是不知道怎么解决，老师不也在teacher.cpp里面定义了两个构造函数吗?有参和无参，怎么我这里定义会显示是重新申明了？表示不懂