babbage% gcc -o read-write-1 read-write-1.c && read-write-1 
The parent process begins.
Parent's report: current index =  0
The child process begins.
Parent's report: current index =  1
Child's report:  current value =  1
Parent's report: current index =  2
Child's report:  current value =  4
Parent's report: current index =  3
Child's report:  current value =  9
Parent's report: current index =  4
Child's report:  current value = 16
Parent's report: current index =  5
Child's report:  current value = 25
Parent's report: current index =  6
Child's report:  current value = 36
Parent's report: current index =  7
Child's report:  current value = 49
Parent's report: current index =  8
Child's report:  current value = 64
Parent's report: current index =  9
Child's report:  current value = 81
Child's report:  current value = 81
The child is done
The parent is done