Question

C++ Both the dot-notation and the arrow-notation can be used to refer to fields of C++ structures. When would you use the dot-notation, and when the arrow-notation?

Answer 1

dot can be used in the c++ structure member object only

arrow can be used in the c++ pointer to an object

#source code in c++ example of dot

1 2 3 4 Ол 6 7 8 9 10 11 #include <iostream> using namespace std; struct Data{ int n; }; int main() { struct Data p; p.n=20; cout<<p.n<<endl; return 0; } Terminal File Edit View Search Terminal Help user@user-Latitude - 3490:-/Desktop$ 9++ 1.cpp user@user-Latitude - 3490:-/Desktop$ ./a.out 20 user@user-Latitude - 3490:-/Desktops |

#example of arrow

1 2 3 4 5 6 7 8 9 10 11 12 #include <iostream> using namespace std; struct Data{ int n; }; struct Data *p=NULL; int main() { p=(struct Data*) malloc(sizeof(struct Data)); p->n=20; cout<<p->n<<endl; return 0; } Terminal File Edit View Search Terminal Help user@user-Latitude - 3490:-/Desktop$ 9++ 1.cpp user@user-Latitude - 3490:-/Desktop$ ./a.out 20 user@user-Latitude - 3490:-/Desktops |

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