Advertisements Im a very new to C language. Im trying to learn about to memory allocation with the next examples. If I allocate memory for a integer like this: int* pint = (int*)malloc(sizeof(int)); if (pint == NULL) { printf("NULL pointer!"); } else { *pint = 5; printf("el valor es: %d", *pint); free(pint); } This show… Read More malloc works with int but not with strings
Advertisements Source: int = 33 float = 0.0 while = 33 Output: while = 33 ^ SyntaxError: invalid syntax Why does assignment to int and float are not generating error in python whereas assignment to while generates error? >Solution : while is a keyword. Keywords are essential parts of the language that cannot be used… Read More Why does assignment to int and float are not generating error whereas assignment to while does generate error?
Advertisements I am unable to figure out how to assign a string to a struct variable using only <stdio.h> header file. The following code gives me an error and I am unable to fix it. #include <stdio.h> struct Student { char name[50]; }; int main() { struct Student s1; printf("Enter studen’s name:\n"); scanf("%s",s1.name); printf("Name :… Read More How to assign a string to struct variable in C?
Advertisements I’m struggling with OOP again. I tried to implement signgly linked list, here’s the code: template <typename T> class node { T value; node* next; public: node(const T& n) { this->value = n; this->next = nullptr; } ~node() { //is it ok to leave destructor empty in my case? } }; template <typename T>… Read More Why assignment operator working even when it was forbidden?
Advertisements Does Powershell have an operator like Python’s :=, which can assign a variable within an expression? (e.g., if (match := pattern.search(data)) is not None) Suppose I want to store a value in Powershell as a variable, but also pass it down the pipeline. Is there a more elegant way than …| ForEach-Object { $foo… Read More Powershell assignment in expression?
Advertisements Is there a way to "assign and return" without creating a utility routine? Here’s my code: static int& do_work_(const int* p, int& result) { result = (*p) * 10; return result; } template<typename T> T& assign(const T* p, T& result) { result = *p; return result; } int& do_work(const int* p, bool cond, int&… Read More Can I assign and return without a utility routine?
Advertisements In operator overloading, the assignment operator is normally defined as follows: T& T::operator =(const T2& b); which returns T& as result. But I want to know what happens when we return void. For example, the assignment operator of std::atmoic<std::shared_ptr<T>> returns void: void operator=( std::shared_ptr<T> desired ) noexcept; as defined here and here. What happens… Read More What happens when opeator= returns void rather than T&?