Fortran

[Pages:66]Fortran

#fortran

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1

1: Fortran

Fortran FortranGNUIntelPGICray

FORTRAN 66 ASAANSI 196637

FORTRAN 77

1978415

Fortran 90

ISO

1991615

Fortran 95

1997615

Fortran 2003

200444

Fortran 2008

2010-09-10

Examples

Fortran

FortranGNU FortrangfortranGNUGCCGNU Linux gfortran

? PathScaleEKOPath ? LLVMDragonEgg ? Oracle Developer Studio ? Absoft Fortran ? Fortran ? NAG Fortran ? PGI

HPC-SystemsIBMCray

Fortran 95 ACM FortranFortran 2003Fortran 2008Fortran Wiki

FortranendFortran

end

"helloworld"

print *, "Hello, world"



2

end

write

write(*,*) "Hello, world" end

program endFortranimplicit noneFortran

program hello implicit none write(*,*) 'Hello world!'

end program hello

hello worldLinuxshellshellfortran ++vivimemacsgeditkatehello hello.f90hello.f90 hello.f90

>gfortran -o hello hello.f90

hello world

>./hello

shell

> Hello world!

"Hello World"

Fortran

program quadratic !a comment !should be present in every separate program unit implicit none real :: a, b, c real :: discriminant real :: x1, x2 print *, "Enter the quadratic equation coefficients a, b and c:" read *, a, b, c discriminant = b**2 - 4*a*c if ( discriminant>0 ) then x1 = ( -b + sqrt(discriminant)) / (2 * a) x2 = ( -b - sqrt(discriminant)) / (2 * a) print *, "Real roots:" print *, x1, x2



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