Different output with c++ pi approximation [duplicate]

Different output with c++ pi approximation [duplicate]

References

Reference NO 1

http://stackoverflow.com/questions/13646493/different-output-with-c-pi-approximation

Reference NO 2

http://www.tutorialspoint.com/cplusplus/cpp_quick_guide.htm

Reference NO 3

http://docs.opencv.org/modules/core/doc/operations_on_arrays.html

Reference NO 4

ftp://ftp.awl.com/cseng/authors/gaddis/CCSO6/LabManual/LM_002_Chp02.pdf

Reference NO 5

http://people.sc.fsu.edu/~jburkardt/cpp_src/mpi/mpi.html

Reference NO 6

http://introcs.cs.princeton.edu/15inout

Reference NO 7

http://www.holoborodko.com/pavel/mpfr/

Reference NO 8

http://www.gnu.org/s/ddrescue/manual/ddrescue_manual.html