Array length: Difference between revisions

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C++ follows the same rules as C regarding static and dynamic arrays.

However, C++ has an additional std::array type (amongst other collections) in its standard library:

However, C++ has an additional <code>std::array</code> type (amongst other collections) in its standard library:

<lang cpp>#include <array>

#include <array>

#include <iostream>

#include <string>

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std::cout << fruit.size();

return 0;

}</lang>

}

</lang>

Note that char* or const char* could have been used instead of std::string.

Note that <code>char*</code> or <code>const char*</code> could have been used instead of <code>std::string</code>.

In addition to the std::array type, the C++ standard library also provides dynamically-sized containers to hold arbitrary objects.

In addition to the <code>std::array</code> type, the C++ standard library also provides dynamically-sized containers to hold arbitrary objects.

These all support similar interfaces, though their implementations have different performance characteristics.

<lang cpp> std::vector<std::string> fruitV({ "apples", "oranges" });

std::vector<std::string> fruitV({ "apples", "oranges" });

std::list<std::string> fruitL({ "apples", "oranges" });

std::deque<std::string> fruitD({ "apples", "oranges" });

std::cout << fruitV.size() << fruitL.size() << fruitD.size() << std::endl;

std::cout << fruitV.size() << fruitL.size() << fruitD.size() << std::endl;</lang>

</lang>

Of these, vector is probably the most widely used.