Programming: Principles and Practice Using C++ (2nd Edition) by Bjarne Stroustrup

Author:Bjarne Stroustrup [Stroustrup, Bjarne]
Language: eng
Format: epub, pdf
Publisher: Pearson Education
Published: 2014-06-02T00:00:00+00:00

17.10.1 More link use

Having dealt with the implementation issues, we can see how the use now looks:

Click here to view code image

Link* norse_gods = new Link{"Thor"};

norse_gods = norse_gods–>insert(new Link{"Odin"});

norse_gods = norse_gods–>insert(new Link{"Zeus"});

norse_gods = norse_gods–>insert(new Link{"Freia"});

Link* greek_gods = new Link{"Hera"};

greek_gods = greek_gods–>insert(new Link{"Athena"});

greek_gods = greek_gods–>insert(new Link{"Mars"});

greek_gods = greek_gods–>insert(new Link{"Poseidon"});

That’s very much like before. As before, we correct our “mistakes.” Correct the name of the god of war:

Click here to view code image

Link* p = greek_gods–>find("Mars");

if (p) p–>value = "Ares";

Move Zeus into his correct Pantheon:

Click here to view code image

Link* p2 = norse_gods–>find("Zeus");

if (p2) {

if (p2==norse_gods) norse_gods = p2–>next();

p2–>erase();

greek_gods = greek_gods–>insert(p2);

}

Finally, let’s print out those lists:

Click here to view code image

void print_all(Link* p)

{

cout << "{ ";

while (p) {

cout << p–>value;

if (p=p–>next()) cout << ", ";

}

cout << " }";

}

print_all(norse_gods);

cout<<"\n";

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