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| author | Wojtek Kosior <kwojtus@protonmail.com> | 2019-06-30 21:50:10 +0200 |
|---|---|---|
| committer | Wojtek Kosior <kwojtus@protonmail.com> | 2019-06-30 21:50:10 +0200 |
| commit | f390347bb4bdab0e57543cae65701dab7200501b (patch) | |
| tree | cabd58b87291d48685fd78ec8b380dc614a8b837 | |
| parent | 252e7692bb85bb813d6442be3de7aa1fe99c8372 (diff) | |
| download | fortran-assignment3-f390347bb4bdab0e57543cae65701dab7200501b.tar.gz fortran-assignment3-f390347bb4bdab0e57543cae65701dab7200501b.zip | |
error handling using GOTO
| -rw-r--r-- | src/main.f90 | 45 |
1 files changed, 33 insertions, 12 deletions
diff --git a/src/main.f90 b/src/main.f90 index 8c7467a..c671b8c 100644 --- a/src/main.f90 +++ b/src/main.f90 @@ -1,6 +1,7 @@ PROGRAM integrator USE quadratures USE functions + USE iso_fortran_env, ONLY: error_unit IMPLICIT none real(kind=8) :: ibeg, iend, val @@ -8,9 +9,14 @@ PROGRAM integrator procedure(integrate), pointer :: numerical_int procedure(funint), pointer :: fun procedure(analytical_integral), pointer :: analytical_int - character(100) :: arg + character(100) :: arg, errmsg + logical :: isok = .true. - IF (command_argument_count() < 4) STOP "4 arguments required" + IF (command_argument_count() < 4) THEN + errmsg = "at least 4 arguments required" + isok = .false. + GOTO 1 + END IF call get_command_argument(2, arg) @@ -24,7 +30,9 @@ PROGRAM integrator fun => my_poly analytical_int => my_poly_int ELSE - STOP "bad second argument (should be 'exp', 'sin' or 'poly')" + errmsg = "bad second argument (should be 'exp', 'sin' or 'poly')" + isok = .false. + GOTO 1 END IF @@ -44,17 +52,22 @@ PROGRAM integrator ELSE IF (arg == "newton-cotes") THEN numerical_int => newton_cotes ELSE IF (arg == "analytical") THEN - IF (this_image() == 1) write (*,*) analytical_int(ibeg, iend) - STOP + if (this_image() == 1) write (*,*) analytical_int(ibeg, iend) + GOTO 1 ELSE - STOP "bad first argument (should be 'gauss', 'newton-cotes'" & - // " or 'analytical')" + errmsg = "bad first argument (should be 'gauss'," & + // " 'newton-cotes' or 'analytical')" + isok = .false. + GOTO 1 END IF - IF (command_argument_count() < 5) & - STOP "5th argument (polynomial order) required" & - // " for numerical integration" + IF (command_argument_count() < 5) THEN + errmsg = "5th argument (polynomial order) required" & + // " for numerical integration" + isok = .false. + GOTO 1 + END IF call get_command_argument(5, arg) read (arg,*) poly_order @@ -63,11 +76,19 @@ PROGRAM integrator IF (command_argument_count() > 5) THEN call get_command_argument(6, arg) read (arg,*) subintervals - IF (subintervals < 1) STOP "subintervals number must be positive" + IF (subintervals < 1) THEN + errmsg = "subintervals number must be positive" + isok = .false. + GOTO 1 + END IF END IF val = numerical_int(ibeg, iend, fun, poly_order) - IF (this_image() == 1) write (*,*) val + if (this_image() == 1) write (*,*) val + + 1 if (this_image() == 1 .and. .not. isok) write(*,*) trim(errmsg) +CONTAINS + END PROGRAM integrator |