有如下的程序: #include <cstring.h> #include <iostream.h> using namespace std; class MyString { public: MyString(const char*s); ~MyString () {delete [] data;} protected: unsigned len; char*data; }; MyString::MyString(const char *s) { len=strlen (s); data=new char[len+1]; strcpy (data,s); } int main () { MyString a("C++ Programing"); MyString b(a); return 0; } 在运行上面的程序时出错,出错的原因是
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