I want to create a std::vector<float> vpd which will be a reference to float*.How should I modify the code, if I want get 23 from cout?
I would like to write a C++ function with one argument such that one can pass in either any of the following types:
I have a simple function template to calculate the average value of a container:I added in the static_cast<>s above to try to force the calculation to the desired type <T>.
C++14 final working draft makes the following comment about std::vector:Storage management is handled automatically, though hints can be given to improve efficiency.
If I have something like:Would STL be able to preallocate space in newVector before processing and adding the new elements? I know it is not a requirement of the algorithm, but would a "good" implementation be able to optimize that? Or, for this kind of case, should I prefer adding...
I have a problem with constant single element std::vector when pass through a function. C++ compiler automatically call wrong function when the std::vector variable contain a single element. This is though the policy of C++ design. However is there any explicit method to specify in such a case. Here are...
Justin's answer on another question made an observation that I find very interesting but can't quite explain. Consider the following code:
In this example comparing two vectors with < operator results in operator <, defined on the Integer class, being called twice for each element. However, this doesn't happen when comparing two vectors with == operator.
I know, that I can initialize data like this.or evenI can also do it with std::vectorLet's say I want to write my own class:
If I construct an empty std::vector using the default constructor (and the default allocator), can it throw an exception?