For a long time, the Fortran compiler in GCC only complies with the Fortran 77 standard. In today's opinion, this language is very primitive. If you want to write a do until loop, you have to write it like this:
10 continue
Mywork
If (condition) goto 10
Worse, f77 has no ADT capability, which makes it impossible for many software design methods developed in 1980s to be applied in FORTRAN.
Fortran 90 and Fortran 95 greatly enhance the capabilities of FORTRAN, and even add some oo capabilities. However, the commercial Fortran compiler is difficult to obtain and expensive. Fortunately, the GNU gfortran 95 compiler will soon be integrated into GCC 3.5. This is undoubtedly a good news for scientific engineering programming on the Linux platform. However, it is said that g95 is not compatible with G77 binary to improve efficiency. Therefore, it is expected that G77 will still be a numerical computation in Linux for a long time.ProgramMain ForceProgramming Language.