< QtCore /qmath.h> header provides various math functions. 更多...
| qreal | qAcos (qreal v ) |
| qreal | qAsin (qreal v ) |
| qreal | qAtan2 (qreal y , qreal x ) |
| qreal | qAtan (qreal v ) |
| int | qCeil (qreal v ) |
| qreal | qCos (qreal v ) |
| qreal | qExp (qreal v ) |
| int | qFloor (qreal v ) |
| qreal | qLn (qreal v ) |
| qreal | qPow (qreal x , qreal y ) |
| qreal | qSin (qreal v ) |
| qreal | qSqrt (qreal v ) |
| qreal | qTan (qreal v ) |
Returns the arccosine of v as an angle in radians. Arccosine is the inverse operation of cosine.
另请参阅 qAtan (), qAsin ()，和 qCos ().
Returns the arcsine of v as an angle in radians. Arcsine is the inverse operation of sine.
另请参阅 qSin (), qAtan ()，和 qAcos ().
Returns the arctangent of a point specified by the coordinates y and x . This function will return the angle (argument) of that point.
另请参阅 qAtan ().
Returns the arctangent of v as an angle in radians. Arctangent is the inverse operation of tangent.
另请参阅 qTan (), qAcos ()，和 qAsin ().
Return the ceiling of the value v .
The ceiling is the smallest integer that is not less than v . For example, if v is 41.2, then the ceiling is 42.
另请参阅 qFloor ().
Returns the cosine of an angle v in radians.
Returns the exponential function of
e
to the power of
v
.
另请参阅 qLn ().
Return the floor of the value v .
The floor is the largest integer that is not greater than v . For example, if v is 41.2, then the floor is 41.
另请参阅 qCeil ().
Returns the natural logarithm of v . Natural logarithm uses base e.
另请参阅 qExp ().
返回值为 x raised to the power of y . That is, x is the base and y is the exponent.
另请参阅 qSqrt ().
Returns the sine of the angle v in radians.
Returns the square root of v . This function returns a NaN if v is a negative number.
另请参阅 qPow ().
Returns the tangent of an angle v in radians.
