mirror of https://github.com/TheAlgorithms/C
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
#include <math.h>
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#include <stdio.h>
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const double pi = 3.141592653589793238462643383279502884;
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/**
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give as arguments to the executable two x and y coordinates
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outputs a polar coordinate
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*/
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int main()
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{
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double x, y;
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double r, theta, thetaFinal;
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scanf("%lf %lf", &x, &y);
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r = hypot(x, y);
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if (x != 0)
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{
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if (y != 0)
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{
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theta = atan(y / x);
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if ((x > 0 && y > 0) || (x == -y))
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{ // Q1
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thetaFinal = theta;
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}
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else if (x < 0 && y > 0)
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{ // Q2
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thetaFinal = theta + pi;
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}
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else if (x < 0 && y < 0)
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{ // Q3
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thetaFinal = theta - pi;
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}
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else if (x > 0 && y < 0)
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{ // Q4
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thetaFinal = 2 * pi - theta;
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}
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}
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}
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if (x == 0)
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{ // exceptions when no actual angle is present
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if (y > 0)
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{
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thetaFinal = pi / 2;
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}
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else
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{
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thetaFinal = -(pi / 2);
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}
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}
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if (y == 0)
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{
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if (x > 0)
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{
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thetaFinal = 0;
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}
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else
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{
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thetaFinal = -pi;
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}
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}
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printf("%.2f %.2f\n", r, atan2(y, x));
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}
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