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：
