Hello World Source casestudy/helloworld/helloworld.c casestudy/helloworld/Makefile Compile and run 8 picc -o helloworldhelloworld.c 8 mpirun -np 4 helloworld Sample output Hello world from process 0 of 4 Hello world from process 3 of 4 Hello world from process 1 of 4 Hello world from process 2 of 4Hello World Source casestudy/helloworld/helloworld.c casestudy/helloworld/Makefile Compile and run % mpicc -o helloworld helloworld.c % mpirun -np 4 helloworld Sample output Hello world from process 0 of 4 Hello world from process 3 of 4 Hello world from process 1 of 4 Hello world from process 2 of 4