Laba 2 | 15 var

#include <stdio.h>
#include <math.h>
#define pi 3.14
int main(void){
    float a = 0, b = 0, fi, r;
    scanf_s("%f %f", &a, &b);
    r = sqrt(a + b);
    if (a == 0 && b == 0)
        fi = 0;
    else if (a > 0 && b >= 0)
        fi = atan(a / b);
    else if (a == 0 && b > 0)
        fi = pi / 2;
    else if (a < 0)
        fi = pi + atan(a / b);
    else if (a == 0 && b < 0)
        fi = 3 * pi / 2;
    else if (a > 0 && b < 0)
        fi = 2 * pi + atan(a / b);
    printf("r = %f\nfi = %f", r, fi);
    return 0;
}