求解这个简单c++作业，嗯有很多错！

include
#include
class MString{
char *s;
int len;
public:
MStirng();
MString(char *ps);
MString(const MString &t);//copy funcation
~MString();
int size();
void swap(MString &t);
void find(char);
void find(MString &t);
MString &strcats(MString& t);
MString &strcpys(MString& t);
};
MString& MString::strcats(MString& t){
char *p;
p=new char[len+t.len+1];
strcpy(p,s);
strcat(p,t.s);
delete[]s;
s=p;
len+=t.len;
return *this;}
MString& Mstring::strcpys(MString& t){
s[1]=strcpy(s[0]);
}
MString::~MString()
int MString::size(int len){
for(int i=0; i<*s;i++);
cout<<s[i]<<" ";
}
void MString::find(char){
if(s.find(s[1])!=-1)
count <<"find"<<s[0]<<endl;
}
void MString::swap(MString &t){
s[0].swap(s[1]);
}
int main{
MString t("I am a student","teacher")
MString p=s;
}

}

s[1]=strcpy(s[0]);
->
strcpy(s[0], t.s[0]);
return &this;

MString t("I am a student","teacher")
->
MString t("I am a student","teacher");

修改后的

 #include <string>
#include <stdlib.h>
#include <algorithm>
#include <iostream>
#include <stdio.h>

using namespace std;


class MString{
    char *s;
    int len;

public:
    //MStirng();
    MString(char *ps);
    MString(const MString &t);//copy funcation
    ~MString();
    int size();
    void swap(MString &t);
    void find(char);
    void find(MString &t);
    MString &strcats(MString& t);
    MString &strcpys(MString& t);

friend ostream& operator <<(ostream &os, const MString &str);
};

MString::MString(char *ps)
{
    len = strlen(ps)+1;
    s = new char[len];
    strcpy(s, ps);
}

MString& MString::strcats(MString& t)
{
    char *p;
    p=new char[len + t.len + 1];
    strcpy(p,s);
    strcat(p, t.s);

    delete s;
    s=p;
    len+=t.len;
    return *this;
}

MString& MString::strcpys(MString& t)
{
    strcpy(s, t.s);
    return *this;
}

MString::~MString()
{
    cout<<"MString descontruct"<<endl;
    delete s;
}

int MString::size()
{
    return len;
}

void MString::find(char c){
    char* k;
    k =  std::find(s, s+len, c);
    if(k != s+len)
        cout <<"find"<<*k<<endl; 
    else
        cout << "not find char "<< c <<endl;

}

void MString::swap(MString &t){
    std::swap(s, t.s);
}

ostream& operator <<(ostream &os, const MString &str)
{
    os<<str.s<<endl;
    return os;
}


int main(void){

    MString t("I am a student");
    //MString p=s;
    MString s("I am a teacher");
    cout<<t;
    t.strcpys(s);
    cout<<t;

    t.strcats(s);
    cout<<t;
    system("pause");
    return 0;
}