(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?

 

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#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.