#include <stdio.h>
#include <math.h>

/*
NAME: AUSTIN
CLASS: COMPUTER PROGRAMMING II
ASSIGNMENT: QUADRATIC EQUATION SOLVER   
DATE: FEBRUARY 13, 2015
*/

void solve_linear (int, int);
void solve_quad (int, int, int);
void solve_real (int, int, int);
void solve_complex (int, int, int);

int main (int argc, char*argv[]) {
   int a,b,c;
   
if (argc == 4)
  sscanf(argv[1], "%d", &a);
 
if (argc == 4)
  sscanf(argv[2], "%d", &b);
 
if (argc == 4)
  sscanf(argv[3], "%d", &c);
 
if (a == 0)
  if (b == 0)
    printf("Degenerate Equation\n");
  else {
    solve_linear (b,c); }
else {
  solve_quad (a,b,c); }
return 0;
}

void solve_linear (int b, int c) {
  float x;
 
x = (-c)/b;
 printf("x = %f\n", x);
}

void solve_quad (int a, int b, int c) {
   if (b * b - 4 * a * c < 0)
     solve_complex (a,b,c);
   else {
    solve_real (a,b,c); }
}

void solve_real (int a, int b, int c) {
  float x1, x2;
 
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);

x2 = (-b - sqrt(b*b-4*a*c))/(2*a);

  printf("x1 = %f\n", x1);
  printf("x2 = %f\n", x2);
}

void solve_complex (int a, int b, int c) {
  float xreal, ximg;

xreal = (-b)/(2*a);

ximg = sqrt(abs(b*b-4*a*c))/(2*a);

  printf("%f + %f i\n", xreal, ximg);
  printf("%f - %f i\n", xreal, ximg);
}