math.h
Phil Winninghoff
plug-devel@lists.PLUG.phoenix.az.us
Sun May 18 19:03:02 2003
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I just started a project using GNU gcc that requires some rotation of =
graphics. The following snippet will not compile using either Debian 2.2 =
or Red Hat 9:
#include <stdio.h>
#include <math.h>
int main() {
float x, y, xp, yp, a;
x =3D 100.0; y =3D 70.0; a=3D0.95;
xp =3D (x*cos(a)) - (y*sin(a));
yp =3D (x*sin(a)) + (y*cos(a));
printf("xp =3D %f\nyp =3D %f\n", xp, yp);
return 0;
}
It compiles using Borland Turbo C++ under MD-DOS.=20
The gcc GNU compiler tells me it can not find either the sin() or cos() =
functions.
Can anyone give me some help?
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<DIV><FONT face=3DArial size=3D2>I just started a project using GNU gcc =
that=20
requires some rotation of graphics. The following snippet</FONT><FONT =
face=3DArial=20
size=3D2> will not compile using either Debian 2.2 or Red Hat =
9:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>#include <stdio.h></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>#include <math.h></FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>int main() {</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> float x, y, xp, yp, a;<BR> =
x =3D 100.0;=20
y =3D 70.0; a=3D0.95;</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> xp =3D (x*cos(a)) - =
(y*sin(a));</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> yp =3D (x*sin(a)) + =
(y*cos(a));<BR> =20
printf("xp =3D %f\nyp =3D %f\n", xp, yp);</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> return 0;</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>}</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>It compiles using Borland Turbo C++ =
under MD-DOS.=20
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>The gcc GNU compiler tells me it can =
not find=20
either the sin() or cos() functions.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Can anyone give me some =
help?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV> </DIV>
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