8/3/2019 2 Handout Program Perskuadrat Fortran
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FORTRAN
CONTOH LATIHAN (PENGANTAR)
* PROGRAM PERSAMAAN KUADRAT* -------------------------C
WRITE (*,'(1X,A)') 'AKAR PERSAMAAN KUADRAT :'WRITE (*,'(1X,A)')
' AX^2 + BX + C = 0 '
WRITE (*,*)1 WRITE (*,'(1X,A,\)') ' NILAI KOEFISIEN A ? 'READ
(*,'(F9.3)') A
CC SELEKSI NILAI A TIDAK BOLEH SAMA DENGAN NOL
IF (A.EQ.0.0) GOTO 1C
WRITE (*,'(1X,A,\)') ' NILAI KOEFISIEN B ? 'READ (*,'(F9.3)')
BWRITE (*,'(1X,A,\)') ' NILAI KOEFISIEN C ? 'READ (*,'(F9.3)')
CWRITE (*,*)
C
C HITUNG NILAI DARI DETERMINAND = B**2 - 4*A*CCC SELEKSI NILAI
DETERMINANC
IF (D.LT.0.)THEN* NILAI DETERMINAN NEGATIF, BERARTI ADA DUA AKAR
BIL KOMPLEK BERLAINAN
Z1 = (-B)/(2*A)Z2 = SQRT(-D)/(2*A)WRITE (*,*) 'ADA DUA AKAR BIL
KOMPLEK BERLAINAN :'WRITE (*,*)
'________________________________'WRITE (*,'(1X,A,F9.3,A,F9.3,A)')
'X1= ',Z1,'+', Z2,'i'WRITE (*,'(1X,A,F9.3,A,F9.3,A)') 'X1=
',Z1,'-', Z2,'i'
ENDIFC
IF (D.EQ.0.) THEN* NILAI DETERMINAN NOL, BERARTI ADA 2 AKAR REAL
KEMBAR
X1 = (-B)/(2*A)WRITE (*,*) 'ADA DUA AKAR REAL KEMBAR :'WRITE
(*,*) '__________________________'WRITE
(*,'(1X,A,F9.3)')'X1=X2=',X1
ENDIFC
IF (D.GT.0.) THEN* NILAI DETERMINAN POSITIF, BERARTI ADA 2 AKAR
REAL BERLAINAN
X1 = (-B + SQRT(D))/(2*A)X2 = (-B - SQRT(D))/(2*A)WRITE (*,*)
'ADA DUA AKAR REAL BERLAINAN :'WRITE (*,*)
'_____________________________'WRITE (*,'(1X,A,F9.3)') 'X1=
',X1WRITE (*,'(1X,A,F9.3)') 'X2= ',X2
ENDIFCC SELESAI
END
