C：多叉

Question

I need to use shared memory and fork to do this:
Multipling random 512x512 matrixes using 4 processes and shared memory.
I know how to fork one child but
How can I fork 4 processes that do 1/4 of work?

Thanks

Answer 1

ct = 0;
while (ct < 3 && fork() == 0) {
    ct++;
}

ct will tell you which thread you are. You should probably check for a return of -1 from fork() , though.

Answer 2

怎么样：再读一遍教科书中的章节，问同学错过的笔记，在他或她溜出办公室时袭击你的助教，然后在上班时间问你的教授！

Answer 3

你为什么不连续三叉？