VC6.0上编译的程序使用不调用全局对象的析构函数

最新推荐文章于 2018-04-23 13:23:41 发布

原创最新推荐文章于 2018-04-23 13:23:41 发布 · 1.2k 阅读

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#destructor #object #constructor #iostream #编译器 #c

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编译环境如下

编译器：VC 6.0

操作系统：Window 7

测试代码一：

#include <iostream> #include <string.h> using namespace std; class CDemo { public: CDemo(const char* str); ~CDemo(); private: char name[20]; }; CDemo::CDemo(const char* str) { strncpy(name, str, 19); name[19] = '/0'; cout << "Constructor called for " << name << endl; } CDemo::~CDemo() { cout << "Destructor called for " << name << endl; } CDemo c_global("global object"); static CDemo c_static("static object"); void main(void) { CDemo c_local("local object"); }

代码一执行结果：

将代码一中的"using namespace std;"去掉，并把“#include <iostream>”改成"#include <iostream.h>"后的代码二如下：

#include <iostream.h> #include <string.h> class CDemo { public: CDemo(const char* str); ~CDemo(); private: char name[20]; }; CDemo::CDemo(const char* str) { strncpy(name, str, 19); name[19] = '/0'; cout << "Constructor called for " << name << endl; } CDemo::~CDemo() { cout << "Destructor called for " << name << endl; } CDemo c_global("global object"); static CDemo c_static("static object"); void main(void) { CDemo c_local("local object"); }

代码二的执行结果：