URI - 1036 Bhaskara's Formula || Solution in C / C++

Read 3 floating-point numbers. After, print the roots of bhaskara’s formula. If it's impossible to calculate the roots because a division by zero or a square root of a negative number, presents the message “Impossivel calcular”.

Input

Read 3 floating-point numbers A, B and C.

Output

Print the result with 5 digits after the decimal point or the message if it is impossible to calculate.

Input Samples	Output Samples
10.0 20.1 5.1	R1 = -0.29788 R2 = -1.71212

0.0 20.0 5.0

Impossivel calcular

10.3 203.0 5.0

R1 = -0.02466 R2 = -19.68408

10.0 3.0 5.0

Impossivel calcular

SOURCE CODE 

#include <stdio.h>

#include <math.h>

int main() {
  float a, b, c, d, r1, r2;
  scanf("%f %f %f", & a, & b, & c);

  d = (pow(b, 2) - (4 * a * c));
  r1 = ((-b + sqrt(d)) / (2 * a));
  r2 = ((-b - sqrt(d)) / (2 * a));

  if (a != 0 && d > 0)
    printf("R1 = %.5lf\nR2 = %.5lf\n", r1, r2);
  else
    printf("Impossivel calcular\n");

  return 0;
}