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fgwei2000
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4Â¥2011-11-01 22:09:10
dingxb
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ÓàÔó³É(½ð±Ò+2): лл²ÎÓëÓ¦Öú£¡ 2011-11-02 10:38:51
ÓàÔó³É(½ð±Ò+2): лл²ÎÓëÓ¦Öú£¡ 2011-11-02 10:38:51
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ÄãÕâ¸öSimposon»ý·Ö·¨¿´ÉϺÃÈ¥ºÃÆæ¹Ö¡£ ÄãÁ½´ÎÇó²îµÄÄ¿µÄÊDz»ÊÇÒªÅжÏÊÇ·ñ´ïµ½ÒªÇóµÄ¾«¶È£¿ µ«ÊÇÄãÔÚSn ºÍS2nµÄ¼ÆËã¹«Ê½Ã²ËÆºÍÆÕͨµÄ¹«Ê½²»Í¬£¬½¨ÒéÖØÐ¼ì²éËùÓй«Ê½¡£ |

2Â¥2011-11-01 14:54:30
dingxb
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fgwei2000(½ð±Ò+2): 2011-11-01 22:10:32
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½¨Òé²Î¿¼ÏÂÁдúÂë Program Simpsons implicit none real, Parameter :: a=0,b=1 integer :: n_points integer :: k,i real :: approx real :: del_x, height, area, t,x real :: n_points_1 Write(*,*)'Enter number of points' Read(*,*)n_points n_points_1 = real(n_points) del_x = abs(b-a)/(n_points_1-1.) approx = 0 t = a do k=1, n_points-1 x = t + del_x/2 area = del_x/6 * ( 4*functio_n ( x ) + functio_n(t) + functio_n(t+del_x) ) t = t + del_x approx = approx + area end do Write(*,*)approx Contains Real Function functio_n(x) Real, Intent(in) :: x functio_n=exp(-x) end function end program |

3Â¥2011-11-01 14:59:13
fgwei2000
ͳæ (ÕýʽдÊÖ)
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5Â¥2011-11-01 23:16:45













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