Final answer:
The correct way to initialize a vector of ints named n with the values 10 and 20 in C++11 is B) vector n = {10, 20};. This syntax takes advantage of list initialization introduced in C++11.
Step-by-step explanation:
The correct statement to initialize a vector of ints named n with the values 10 and 20 using C++11 is:
Option B) vector n = {10, 20};
This statement uses the list initialization introduced in C++11, which allows the initialization of a vector with a brace-enclosed list of values. Here's a step-by-step explanation of each option:
- A) vector n(10, 20); - This would create a vector with 10 elements, all initialized to the value of 20.
- B) vector n = {10, 20}; - The correct way to initialize a vector with the exact values of 10 and 20.
- C) vector n { 10, 20 }; - Also correct; it is another form of list initialization available in C++11, similar to option B.
- D) int vector n ({10},{20}); - This is incorrect syntax and will not compile.
Therefore, the correct answers using C++11 to initialize a vector with exact values would be B or C. However, since C was not provided as an option in the original question as a valid choice, the correct answer from the ones provided is B.