private double PointToAngle(Point AOrigin, Point APoint) { if (APoint.X == AOrigin.X) if (APoint.Y > AOrigin.Y) return Math.PI * 0.5f else return Math.PI * 1.5f else if (APoint.Y == AOrigin.Y) if (APoint.X > AOrigin.X)

private double PointToAngle(Point AOrigin, Point APoint) { if (APoint.X == AOrigin.X) if (APoint.Y > AOrigin.Y) return Math.PI * 0.5f else return Math.PI * 1.5f else if (APoint.Y == AOrigin.Y) if (APoint.X > AOrigin.X)

Vigenere密码单表代换加密如明文为:wearediscoveredsaveyourself 密钥流为:ddeferfrfdwfefeggasdwfeffrg 密文流为:asfhjkhfkjerhfkjbjkfbdjkfgjk 即Ci=(Ki+Pi) 26 pi=(Ci-Ki) 26 要求实现加密和解密,C或C++描述源程序。 -Vigenere encrypted password alone, such as clear as the table Substitution

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