有如下的程序; #include <ctring> #include <iostream> 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,