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RAD2DEG.C
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C/C++ Source or Header
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1996-11-24
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763b
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40 lines
/* +++Date last modified: 03-Nov-1996 */
/*
** RAD2DEG.C - Functions to convert between radians and degrees
*/
#include <math.h>
#include "snipmath.h"
#undef rad2deg /* These are macros defined in PI.H */
#undef deg2rad
double rad2deg(double rad)
{
return (180.0 * rad / (PI));
}
double deg2rad(double deg)
{
return (PI * deg / 180.0);
}
#ifdef TEST
#include <stdio.h>
main()
{
double X;
for (X = 0.0; X <= 360.0; X += 45.0)
printf("%3.0f degrees = %.12f radians\n", X, deg2rad(X));
puts("");
for (X = 0.0; X <= (2 * PI + 1e-6); X += (PI / 6))
printf("%.12f radians = %3.0f degrees\n", X, rad2deg(X));
return 0;
}
#endif /* TEST */