i have one problem, function sort and dynamic array , program dont run, error, can you help me, find error and fix it. thanks very much.

Code:class MyIntArray{ public: MyIntArray(int N); ~MyIntArray(); int operator [](int i); MyIntArray &operator=(const MyIntArray &A); void sort(); private: int *ptr; int len; };Code:#include"MyIntArray.h" #include"iostream" #include "string" int N =10; //using namespace std; MyIntArray::MyIntArray(int N){ // allocate array of N integers ptr=new int[N]; } MyIntArray::~MyIntArray(){ delete ptr; } int MyIntArray::operator [](int i){ return ptr[i]; } MyIntArray &MyIntArray::operator =(const MyIntArray &A){ // len=(int)strlen(ptr.); //A=new int[N]; for(int i=0;i<N;i++){ A[i]=ptr[i]; } return (*this); } void MyIntArray:Sort(){ int tmp; for(i=0;i<len;i++){ for(int j=i;j<N;j++){ if(ptr[j]>ptr[j+1]){ tmp=ptr[j]; ptr[j]=ptr[j+1]; ptr[j+1]=tmp; } } } }Code:MyIntArray IArr(5); // allocate array of 5 integers for (int i=0; i<5 i++) cin >> IArr[i]; // input value from user cout << “before sorting:” << endl; cout << IArr << endl; MyIntArray IAS(1); IAS = IArr; IAS.Sort(); cout << “after sorting:” << endl; cout << IAS << endl;