Difficulty: 1/10

Date added: 13th of July 2008

In this exercise, you must think about problems that might occur and how to prevent these.

Answer the following questions about the code below:

0) What problem might occur?

1) How can you prevent this?


#include <cstdlib>

#include <vector>

 

int main()

{

  std::vector<int> v;

 

  //Lots of code #0

 

  const int maxIndex = static_cast<int>(v.size());

 

  //Lots of code #1

 

  const int index = std::rand() % maxIndex; //Draw a random index

 

  //Lots of code #2

 

  v[index] = 0;

 

  //Lots of code #3

}

View the answer of this exercise.

Go back to Richel Bilderbeek's C++ page.

Go back to Richel Bilderbeek's homepage.

(C++) Exercise #4: Reading from a std::vector safely