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I know almost nothing about Fortran but need to use a program by others. I encountered a problem in determining the "Single-Precision Machine Constants" for my desktop computer (intel pentium dual core 5200 2mb l2 2.5ghz 800 fsb with Window Vista). Please take a look at following part or comment in the code. Could anyone help me to determne R1MACH(1 to 5)?

C Single-Precision Machine Constants r1mach27

C R1MACH(1) = B**(EMIN-1), the smallest positive magnitude. r1mach28

C R1MACH(2) = B**EMAX*(1 - B**(-T)), the largest magnitude. r1mach29

C R1MACH(3) = B**(-T), the smallest relative spacing. r1mach30

C R1MACH(4) = B**(1-T), the largest relative spacing. r1mach31

C R1MACH(5) = LOG10(B) r1mach32

C***REFERENCES FOX, P.A., HALL, A.D., SCHRYER, N.L, *FRAMEWORK FOR r1mach33

C A PORTABLE LIBRARY*, ACM TRANSACTIONS ON MATHE- r1mach34

C MATICAL SOFTWARE, VOL. 4, NO. 2, JUNE 1978, r1mach35

C PP. 177-188. r1mach36

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# Help needed in floating point calc in fortran

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