CODEWITHSUNDEEP
c++syntax
Neerav Bohra
Neerav Bohra

Reputation: 23

In which version of c++ was comma separated multi-line if statement introduced and are there any downsides of using it?

I came across this line of code yesterday:

if(flag[j] == 0) q.push(j), flag[j]=1, val[j]=0, parent[j]=p;

I didn't know we could write multi-line if statement like this and couldn't find any article related to this. Are there any downsides of using it?

Upvotes: 1

Views: 399

Answers (1)

Alan Birtles
Alan Birtles

Reputation: 36419

if statements apply to a single statement. Normally you would make multiple statement into a single statement using braces.

In your example the comma operator is being used instead. I can't think of any good reason to do this, if you need to use multiple expressions use braces. Using commas is harder to read and will confuse non-c++ experts (and even some experts, the comma operator isn't a widely used part of the language).

Upvotes: 4

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