babbage% gcc -o read-write-1 read-write-1.c && read-write-1 
The parent process begins.
Parent's report: current index =  0
Parent's report: current index =  1
Parent's report: current index =  2
Parent's report: current index =  3
Parent's report: current index =  4
Parent's report: current index =  5
Parent's report: current index =  6
Parent's report: current index =  7
Parent's report: current index =  8
Parent's report: current index =  9
The child process begins.
Child's report:  current value = 81
Child's report:  current value = 81
Child's report:  current value = 81
Child's report:  current value = 81
Child's report:  current value = 81
Child's report:  current value = 81
Child's report:  current value = 81
Child's report:  current value = 81
Child's report:  current value = 81
Child's report:  current value = 81
The child is done
The parent is done