一段程序出错，求改正

#include <iostream>
#include <string>
using namespace std;
class Teacher
{public:
    Teacher(string nam,int a,string t)
    {name=nam;
     age=a;
     title=t;
    }
    void display()
    {
        cout<<"name:"<<name<<endl;
        cout<<"age:"<<age<<endl;
        cout<<"title:"<<title<<endl;
    }

 protected:
    string name;
    int age;
    string title;
};
class Student
{public:
     Student(char nam[],char s,float sco)
        {strcpy(name1,nam);
         sex=s;
         score=sco;
        }
    void display1()
        {cout<<"name:"<<name1<<endl;
         cout<<"sex:"<<sex<<endl;
         cout<<"score:"<<score<<endl;
        }
protected:
    string name1;
    char sex;
    float score;
};
class Graduate:public Teacher,public Student
{public:
Graduate(string nam,int a,char s,string t,float sco,float w):
        Teacher(nam,a,t),Student(nam,s,sco),wage(w){}
    void show()
    {
        cout<<"name:"<<name<<endl;
        cout<<"age:"<<age<<endl;
        cout<<"sex:"<<sex<<endl;
        cout<<"score:"<<score<<endl;
        cout<<"title:"<<title<<endl;
        cout<<"wages:"<<wages<<endl;
    }
private:
    float wage;
};
int main()
{
    Graduate grad1("Wang-Li",24,'f',"assistant",89.5,1200);
    grad1.show();
    return 0;
}

C:\Users\SAMSUNG\Desktop\.....cpp    In constructor 'Student::Student(char*, char, float)':
26    20    C:\Users\SAMSUNG\Desktop\.....cpp    [Error] 'strcpy' was not declared in this scope
C:\Users\SAMSUNG\Desktop\.....cpp    In constructor 'Graduate::Graduate(std::string, int, char, std::string, float, float)':
43    45    C:\Users\SAMSUNG\Desktop\.....cpp    [Error] no matching function for call to 'Student::Student(std::string&, char&, float&)'
43    45    C:\Users\SAMSUNG\Desktop\.....cpp    [Note] candidates are:
25    3    C:\Users\SAMSUNG\Desktop\.....cpp    [Note] Student::Student(char*, char, float)
25    3    C:\Users\SAMSUNG\Desktop\.....cpp    [Note] no known conversion for argument 1 from 'std::string {aka std::basic_string<char>}' to 'char*'
23    7    C:\Users\SAMSUNG\Desktop\.....cpp    [Note] Student::Student(const Student&)
23    7    C:\Users\SAMSUNG\Desktop\.....cpp    [Note] candidate expects 1 argument, 3 provided
C:\Users\SAMSUNG\Desktop\.....cpp    In member function 'void Graduate::show()':
51    22    C:\Users\SAMSUNG\Desktop\.....cpp    [Error] 'wages' was not declared in this scope