new-operator

问题 I was creating this simple test program to demonstrate the way alignment works when allocating memory using standard new... #include <iostream> #include <iomanip> #include <cstdint> // // Print a reserved block: its asked size, its start address // and the size of the previous reserved block // void print(uint16_t num, uint16_t size_asked, uint8_t* p) { static uint8_t* last = nullptr; std::cout << "BLOCK " << num << ": "; std::cout << std::setfill('0') << std::setw(2) << size_asked << "b, ";

问题 I am gettin' stared wiith python. I got a udemy course and also read this post: How To Let Your Main Window Appear after succesful login in Tkinter(PYTHON 3.6 Still, I am unable to implement the recired event. I want to open a new (main) window of the desctop app after login. For some reason the script also opens a third window all of a sudden. I am getting really frusted working since 2 das on that stuff... Thanks for help :) from tkinter import Tk, Label, Button, messagebox from tkinter

问题 Can anyone help me, why I'm getting an error message while trying to free the allocated memory: Heap corruption detected. CTR detected the application wrote the memory after end of heap buffer. char *ff (char *s){ char *s1 = new char [strlen(s)]; strcpy(s1, s); return s1; } int _tmain(int argc, _TCHAR* argv[]) { char *s = new char [5]; strcpy(s, "hello"); char *s2 = ff(s); delete []s; // This works normal delete []s2; // But I get an error on that line return 0; } 回答1: char *s = new char [5];

问题 Can anyone help me, why I'm getting an error message while trying to free the allocated memory: Heap corruption detected. CTR detected the application wrote the memory after end of heap buffer. char *ff (char *s){ char *s1 = new char [strlen(s)]; strcpy(s1, s); return s1; } int _tmain(int argc, _TCHAR* argv[]) { char *s = new char [5]; strcpy(s, "hello"); char *s2 = ff(s); delete []s; // This works normal delete []s2; // But I get an error on that line return 0; } 回答1: char *s = new char [5];

问题 When string is created by using literal, it gets stored in pool. But when new operator is used to create String object, it stores the object in Heap. But is the object in heap just a pointer to literal stored in pool or is it a simple String object stored in heap which is eligible for GC? 回答1: Terminology: The constant pool is an area in (each) .class file that contains various constants, including strings. No runtime objects exist in the constant pool. It is a region of a file . The string

问题 When string is created by using literal, it gets stored in pool. But when new operator is used to create String object, it stores the object in Heap. But is the object in heap just a pointer to literal stored in pool or is it a simple String object stored in heap which is eligible for GC? 回答1: Terminology: The constant pool is an area in (each) .class file that contains various constants, including strings. No runtime objects exist in the constant pool. It is a region of a file . The string

来源： https://stackoverflow.com/questions/14314422/not-understanding-use-of-new-keyword-in-javascript

来源： https://stackoverflow.com/questions/14314422/not-understanding-use-of-new-keyword-in-javascript

来源： https://stackoverflow.com/questions/27085657/javascript-function-constructor-works-without-the-new-keyword

来源： https://stackoverflow.com/questions/11313517/malloc-and-constructors-in-c