d3r2.txt

来自「VB常用数值算法集 内含有解线性代数方程组」· 文本 代码 · 共 24 行

Private Sub Command1_Click()
    'PROGRAM D3R2
    'Driver for routine QTRAP
    PIO2 = 1.5707963
    A = 0#
    B = PIO2
    Print
    Print Tab(5); "Integral of FUNC computed with QTRAP"
    Print
    Print Tab(5); "Actual value of integral is:";
    Print Tab(34); Format$((FINT(B) - FINT(A)), "0.####00")
    Print
    Call QTRAP(A, B, S)
    Print Tab(5); "Result from routine QTRAP is:";
    Print Tab(35); Format$(S, "0.####00")
End Sub
Function FUNC(X)
    FUNC = (X ^ 2) * (X ^ 2 - 2#) * Sin(X)
End Function
Function FINT(X)
    'Integral of FUNC
    AAA = 4# * X * (X ^ 2 - 7#) * Sin(X)
    FINT = AAA - (X ^ 4 - 14# * X ^ 2 + 28#) * Cos(X)
End Function