How to jump out of a C++ code block?

How about

do
{
    ...
    if(condition)
        break;
    ...
}
while (0);

I don't particularly like this style but I've seen it before. If refactoring is out of the question (could be for a massive block that can break a lot of stuff if changed), this is an option.

Here's one way:

switch(0) {
default:
    /* code */
    if (cond) break;
    /* code */
}

(please never do this)