LANGUAGE » CPP
Array
Vectors
Creating vectors and optionally debugging (by including fmt/ranges.h):
cpp
#include <vector>
int main()
{
// Initialization
std::vector<int> numbers;
numbers.push_back(2);
numbers.push_back(3);
numbers.push_back(5);
std::vector<char> letters = {'a', 'c', 'f'};
// Debug
fmt::print("{}\n", numbers);
fmt::print("{}\n", letters);
return 0;
}TIP
Use .reserve(size) to request a custom capacity (good to avoid multiple reallocations).
Manual dynamic array
Use the new keyword to create a new array dinamically. Don't forget to delete it.
cpp
#include <fmt/ranges.h>
int main()
{
// Initialization
size_t size = 3;
int* numbers = new int[size];
numbers[1] = 99;
// Debug
fmt::print("[{}]\n", fmt::join(numbers, numbers + size, ", "));
delete[] numbers;
return 0;
}It may be a good idea to use a Smart Pointer. In this case there is no need to delete it.
Debugging its contents is a bit more verbose (if not using c++20 features).
cpp
#include <fmt/base.h>
#include <memory>
int main()
{
// Initialization
size_t size = 3;
auto numbers = std::make_unique<int[]>(size);
numbers[1] = 99;
// Debug
fmt::print("[");
for (size_t i = 0; i < size - 1; ++i) {
fmt::print("{}, ", numbers[i]);
}
fmt::print("{}]\n", numbers[size - 1]);
return 0;
}