Difference between revisions of "cpp/numeric/math/atan2"
(+integral overloads (a bit more complicated for two-argument functions)) |
m (better explanation for integers) |
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{{ddcl list begin}} | {{ddcl list begin}} | ||
{{ddcl list header | cmath}} | {{ddcl list header | cmath}} | ||
| − | {{ddcl list item | | + | {{ddcl list item | num = 4 | |
float atan2( float y, float x ); | float atan2( float y, float x ); | ||
}} | }} | ||
| − | {{ddcl list item | | + | {{ddcl list item | num = 4 | |
double atan2( double y, double x ); | double atan2( double y, double x ); | ||
}} | }} | ||
| − | {{ddcl list item | | + | {{ddcl list item | num = 4 | |
long double atan2( long double y, long double x ); | long double atan2( long double y, long double x ); | ||
}} | }} | ||
| − | {{ddcl list item | notes={{mark since c++11}} | | + | {{ddcl list item | notes={{mark since c++11}} | num = 4 | |
| − | + | Promoted atan2( Arithmetic y, Arithmetic x ); | |
| − | + | ||
| − | + | ||
| − | + | ||
}} | }} | ||
{{ddcl list end}} | {{ddcl list end}} | ||
Computes the inverse tangent of {{tt|y/x}} using the signs of arguments to correctly determine quadrant. | Computes the inverse tangent of {{tt|y/x}} using the signs of arguments to correctly determine quadrant. | ||
| + | |||
| + | 4) If any argument has integral type, it is cast to {{cpp|double}}. If any other argument is {{cpp|long double}}, then the return type is {{cpp|long double}}, otherwise it is {{cpp|double}}. | ||
===Parameters=== | ===Parameters=== | ||
Revision as of 15:16, 17 January 2012
Template:cpp/numeric/math/sidebar Template:ddcl list begin <tr class="t-dsc-header">
<td><cmath>
<td></td> <td></td> </tr> <tr class="t-dcl ">
<td ><td > (4) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl ">
<td ><td > (4) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl ">
<td ><td > (4) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl ">
<td ><td > (4) </td> <td > (since C++11) </td> </tr> Template:ddcl list end
Computes the inverse tangent of y/x using the signs of arguments to correctly determine quadrant.
4) If any argument has integral type, it is cast to Template:cpp. If any other argument is Template:cpp, then the return type is Template:cpp, otherwise it is Template:cpp.
Contents |
Parameters
| x, y | - | floating point value |
Return value
arc tangent of y/x in radians in the range of [-π; π] radians.
Example
