CSE2050 Exam 1, open book, open notes.  Name ____________________________

1.  Write a function, assign(), that copies a string to a vector<char>
using the copy() function.  The size of the vector should be changed
to match that of the string.  Use the most efficient parameter
passing techniques.  For example (40 pts).

  string s="cat";
  vector<char> v(10);
  assign(v, s);  // v[0], v[1], v[2] is 'c', 'a', 't', v.size() is 3

  // Answer
  void assign(vector<char>& v, const string& s) {
    v.resize(s.size());
    copy(s.begin(), s.end(), v.begin());
  }


2.  Write a declaration of v that gives the same result without calling
assign(), i.e. declares v and initializes it to contain a copy of the
elements of s in a single statement (10 pts).

  // Answer
  vector<char> v(s.begin(), s.end());


3.  Write code to print the elements of v (i.e. "cat") using
const_iterators (10 pts).

  // Answer
  for (vector<char>::const_iterator p=v.begin(); p!=v.end(); ++p)
    cout << *p;


4.  Suppose that test.cpp contains the following:

  #include "test.h"
  namespace mylib {
    void test(int i) {
      if (i < 0)
        throw i;
    }
  }

Write main.cpp, which calls test() with a negative argument, catches the
exception, and prints the value thrown.  Write test.h to enforce consistency
with main.cpp.  Show the g++ command to compile your program. (40 pts).

  // Answer: main.cpp
  #include <iostream>
  #include "test.h"
  using namespace std;
  int main() {
    try {
      mylib::test(-1);  // or add: using namespace mylib;
    }
    catch (int x) {
      cout << x << endl;
    }
    return 0;
  }

  // test.h
  namespace mylib {
    void test(int);
  }

  // To compile: g++ main.cpp test.cpp