newintro.cpp

来自「本课程主要介绍面向对象程序设计的方法和c++语言的基本概念。以c++语言中的面向」· C++ 代码 · 共 21 行

// newintro.cpp
// introduces operator new
#include <iostream>
#include <cstring>            //for strlen            
using namespace std;

int main()
   {
   char* str = "Idle hands are the devil's workshop.";
   int len = strlen(str);     //get length of str

   char* ptr;                 //make a pointer to char
   ptr = new char[len+1];     //set aside memory: string + '\0'

   strcpy(ptr, str);          //copy str to new memory area ptr

   cout << "ptr=" << ptr << endl;  //show that ptr is now in str

   delete[] ptr;              //release ptr's memory
   return 0;
   }