Calculator for Quadratic Equations

SUBMITTED BY: uuuuuu

DATE: Oct. 24, 2016, 7:11 p.m.

FORMAT: Text only

SIZE: 1.1 kB

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  1. #include <stdio.h>
  2. #include <conio.h>
  3. #include <math.h>
  5. int main()
  6. {
  7. printf("Calculator for Quadratic Equations.Please enter values for a, b and c. \n");
  9. float a, b, c;
  10. float x1, x2, d;
  12. printf("Enter a = ");
  13. scanf("%g", &a);
  15. printf("Enter b = ");
  16. scanf("%g", &b);
  18. printf("Enter c = ");
  19. scanf("%g", &c);
  21. if (a == 0)
  22. {
  23. x1 = - c / b;
  24. printf("x1 = %g\n", x1);
  25. }
  26. else if (b == 0)
  27. {
  28. if (-c / a < 0)
  29. {
  30. printf("Nqma reshenie\n");
  31. }
  32. else
  33. {
  34. x1 = sqrt(-c / a);
  35. x2 = -1 * sqrt(-c / a);
  37. printf("x1 = %g\n", x1);
  38. printf("x2 = %g\n", x2);
  39. }
  41. }
  42. else if (c == 0)
  43. {
  44. x1 = 0;
  45. x2 = -b / a;
  47. printf("x1 = %g\n", x1);
  48. printf("x2 = %g\n", x2);
  50. }
  51. else
  52. {
  53. d = b*b - 4 * a*c;
  54. if (d < 0)
  55. {
  56. printf("Nqma realni koreni\n");
  57. }
  58. else if (d == 0)
  59. {
  60. x1 = (-b) / (2 * a);
  61. printf("x1 = x2 = %g\n", x1);
  62. }
  63. else
  64. {
  65. x1 = (-b + sqrt(d)) / (2 * a);
  66. x2 = (-b - sqrt(d)) / (2 * a);
  68. printf("x1 = %g\n", x1);
  69. printf("x2 = %g\n", x2);
  70. }
  71. }
  73. system("PAUSE");
  74. return 0;
  75. }
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