Roots of unity: Difference between revisions

=={{header|C}}==

#include <ansi_c.h>

#define PI 3.1415926

int main (int argc, char *argv[])

{

char sign;

int i, n;

float rpart, ipart, angle;

for (n = 2; n <= 10; n++)

{

angle = 0.0;

printf("%d: ", n);

for (i = 1; i <= n; i++)

{

rpart = cos(angle);

ipart = sin(angle);

if (ipart < 0)

{

sign = '-';

}

else

{

sign = '+';

}

printf("%5.4f%cj%5.4f ", rpart, sign, fabs(ipart));

angle = angle + 2.0*PI/(float)n;

}

printf("\n");

}

}