Some Simple Exercises

Compile and run the hello and pi programs.
Modify the pi program to use send/receive instead of bcast/reduce.
Write a program that sends a message around a ring. That is, process 0 reads a line from the terminal and sends it to process 1, who sends it to process 2, etc. The last process sends it back to process 0, who prints it.
Time programs with MPI_WTIME. (Find it.)

Compile and run the hello and pi programs.