ex1.c: Introductory example that illustrates printing
ex2.c: Synchronized printing
ex3.c: Augmenting PETSc profiling by add events
ex4.c: Introductory example that illustrates running PETSc on a subset of processes
ex5.c: Demonstrates using the PetscBag Object\n\n
ex6.c: Example of using PetscLikely() and PetscUnlikely()
ex16.c: Tests calling PetscOptionsSetValue() before PetscInitialize()\n\n
ex17.c: Demonstrates PetscGetVersonNumber()
ex19.c: Illustrates creating an options database
makefile