||Transfers execution to a labeled statement
statement := goto identifier ;
The goto statement transfers control to another
statement in the same function. The identifier
must match a statement label elsewhere in the function. Statement
labels have the form identifier
Control cannot transfer into a try block.
Transferring control into the middle of a block and across a
declaration results in undefined behavior unless the declaration is
for an uninitialized POD object.
while (getline(cin, line))
for (size_t i = 0; i < line.size( ); ++i)
if (line[i] == '.')
goto exit; // Break out of nested loops.
statement, Chapter 4