1.      Program to find the roots of a quadratic equation.

1. #include <iostream.h>

2. #include <math.h>

3. #include <conio.h>

4. int main() {

5.     float a, b, c, discriminant, root1, root2, realPart, imagPart;

6.     cout << "Enter coefficients a, b, and c: ";

7.     cin >> a >> b >> c;

8.     discriminant = b * b - 4 * a * c;

9.     if (discriminant > 0) {

10.         root1 = (-b + sqrt(discriminant)) / (2 * a);

11.         root2 = (-b - sqrt(discriminant)) / (2 * a);

12.         cout << "Roots are real and different." << endl;

13.         cout << "Root 1 = " << root1 << endl;

14.         cout << "Root 2 = " << root2 << endl;

15.     } else if (discriminant == 0) {

16.         root1 = root2 = -b / (2 * a);

17.                 cout << "Roots are real and same." << endl;

18.         cout << "Root 1 = Root 2 = " << root1 << endl;

19.     } else {

20.                 realPart = -b / (2 * a);

21.                 imagPart = sqrt(-discriminant) / (2 * a);

22.                 cout << "Roots are complex and different." << endl;

23.                 cout << "Root 1 = " << realPart << " + i" << imagPart << endl;

24.                 cout << "Root 2 = " << realPart << " - i" << imagPart << endl;

25.     }

26.     getch();

27.     return 0;

29. }

     

30. 1.      Program to find the roots of a quadratic equation.

31. #include <iostream.h>

32. #include <math.h>

33. #include <conio.h>

34. int main() {

35.     float a, b, c, discriminant, root1, root2, realPart, imagPart;

36.     cout << "Enter coefficients a, b, and c: ";

37.     cin >> a >> b >> c;

38.     discriminant = b * b - 4 * a * c;

39.     if (discriminant > 0) {

40.         root1 = (-b + sqrt(discriminant)) / (2 * a);

41.         root2 = (-b - sqrt(discriminant)) / (2 * a);

42.         cout << "Roots are real and different." << endl;

43.         cout << "Root 1 = " << root1 << endl;

44.         cout << "Root 2 = " << root2 << endl;

45.     } else if (discriminant == 0) {

46.         root1 = root2 = -b / (2 * a);

47.                 cout << "Roots are real and same." << endl;

48.         cout << "Root 1 = Root 2 = " << root1 << endl;

49.     } else {

50.                 realPart = -b / (2 * a);

51.                 imagPart = sqrt(-discriminant) / (2 * a);

52.                 cout << "Roots are complex and different." << endl;

53.                 cout << "Root 1 = " << realPart << " + i" << imagPart << endl;

54.                 cout << "Root 2 = " << realPart << " - i" << imagPart << endl;

55.     }

56.     getch();

57.     return 0;

58. }