fortran 77 fortran 77 fortran 77 fortran 77 fortran 77 fortran 77
fortran 77 fortran 77 fortran 77 fortran 77 fortran 77 fortran 77
fortran 77 fortran 77 fortran 77 fortran 77 fortran 77 fortran 77
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FORTRAN <strong>77</strong><br />
Espressioni<br />
FORTRAN <strong>77</strong><br />
IF<br />
Manipolazioni di stringhe:<br />
IF<br />
({espressione logica}) {istruzione}<br />
S1//S2<br />
(concatenazione)<br />
S(e1:e2) (sottostringa)<br />
LENGTH(S) (lunghezza)<br />
INDEX(S,’T’)(ricerca)<br />
es: S1=‘ABC’,S2=‘DEF’ S=S1//S2 S=‘ABCDEF’<br />
S(3:5)=‘546’ S=‘AB546F’<br />
S=S(1:4) S=‘AB54’<br />
L=LENGTH(S) L=4<br />
L=INDEX(S,’B5’) L=2<br />
in generale:<br />
IF<br />
({espressione logica}) THEN<br />
{istruzioni}<br />
ELSEIF ({espressione logica}) THEN<br />
{istruzioni}<br />
...<br />
ELSE<br />
ENDIF<br />
{istruzioni}<br />
es: b 2 -4ac≥0 ⇒ ‘radici reali’<br />
FORTRAN <strong>77</strong><br />
IF (B**2-4.*A*C.GE.0.) WRITE(*,*) ‘reali’<br />
es: b 2 -4ac≥0,
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