Programming

     1  #include <iostream>
     2  #include <string>
     3  #include <sstream>
     4
     5  using namespace std;
     6
     7  class myEx {
     8    std:: string _file, _message;
     9    int _line;
    10  public:
    11    myEx(std::string file, int line);
    12    std::string toString();
    13  };
    14
    15  myEx::myEx(string file, int line) {
    16    _file = file;
    17    _line = line;
    18    _message = "Unable to copy. ";
    19    toString();
    20  }
    21
    22  string myEx::toString()
    23  {
    24    ostringstream os;
    25    os << _message <<"Error occurred at " << _file << ":" << _line;
    26    return os.str();
    27  }
    28
    29  template <typename T, int size_x>
    30  static void toCopy(T(&x)[size_x], const T(*y)) {
    31    if(strlen(y) >= size_x) {
    32      throw myEx(__FILE__, __LINE__);
    33    }
    34    strncpy(x, y, size_x);
    35  }
    36
    37  int main()
    38  {
    39    char first[4];
    40
    41    string second = "WELCOME";
    42    try {
    43      toCopy(first, second.c_str());
    44      cout << "Copied Successfully! the " <<first<<endl;
    45    }
    46    catch(myEx &e)
    47    {
    48      cout << e.toString() << endl;
    49    }
    50    return 0;
    51  }