[Solved] how to convert char * to boost::shared_ptr?

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You cannot convert a string literal to a shared pointer. Let me just “correct” your code, and then all you have remaining is undefined behavior: const char *str = “abcdfg”; boost::shared_ptr<char> ss(str); Now, this will compile, but it will produce serious problems because str is not memory that was allocated dynamically. As soon as the … Read more

[Solved] Why does a C++ pointer to char act as a character string despite the lack of a null terminator?

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This operator+ is used here (a pointer to single char that is not null-terminated is not really suitable). Yes, most definitely undefined behavior. lhs – string, character, or pointer to the first character in a null-terminated array Just make std::string the common type to fix it: ((d == ‘\0’) ? std::string(“null character”) : std::string(1, d)) … Read more

[Solved] can someone explain how to use str.index and str.find and why the following code is wrong

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Check the documentation https://docs.python.org/3/library/stdtypes.html#string-methods https://docs.python.org/3/library/stdtypes.html#str.index Build your code around the method: # characters to look for in a list (string would work as well) vowels = [“a”,”i”,”o”,”u”,”e”,”y”] # a function (method) def vowel_indices(word): # prepare empty list to collect the positions in hits = [] # test every of your vowels for vowel in vowels: … Read more

[Solved] Why can not use “return lhs.size() == rhs.size()” in std::sort() compare function?

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Because comp1(a,b) and comp1(b,a) can both return true, which isn’t allowed. std::sort states that: comp – comparison function object (i.e. an object that satisfies the requirements of Compare) which returns ​true if the first argument is less than (i.e. is ordered before) the second. And following the link to Compare we also see: Establishes strict … Read more

[Solved] PHP OOP about class

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It is called chainable methods. In order to apply a method on $theclassvariable it needs to be an instance of a class. Let’s define it: class myClass { public function __construct() { echo ‘a new instance has been created!<br />’; } public function firstMethod() { echo ‘hey there that\’s the first method!<br />’; return $this; … Read more

[Solved] why does overload operator= makes exception safety

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Although the question might not be too precise, I think I still got the point: Imagine, the code would have been written as follows: Widget& Widget::operator=(const Widget& rhs) { if (rhs == *this) // actually, you’d rather do &rhs == this! // you don’t want self-assignment return; delete pb; pb = new Bitmap(*rhs.pb); return *this; … Read more

[Solved] Some problems regarding my website

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Try to move your question to the correct queue How ever try with this RewriteEngine on RewriteBase /site_folder/ RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php [L] 2 solved Some problems regarding my website

[Solved] given two integers write a program that uses function add() to add these numbers and sub() to find the difference [closed]

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You just need to pass parameters no need specify parameter type when calling the function in c. Change h=add(int x, int y); to h=add(x,y); have a look at this:-http://www.techcrashcourse.com/2015/05/c-programming-function-calling.html solved given two integers write a program that uses function add() to add these numbers and sub() to find the difference [closed]