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

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 <vector>

#include <cstdlib>

int main()

{

std::vector<int> v;

//Lots of code

const int maxIndex = v.size();

//Lots of code

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

//Lots of code

v[index] = 0;

//Lots of code

}

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