QuadraticEquation

Order Of Programs.md

@@ -18,4 +18,5 @@
 |16        | MaximumNo4.c | MaximumNo4.exe | WAP to find out maximum out of three numbers using nested if..else |
 |17        | PositiveOrNegative.c | PositiveOrNegative.exe | WAP to find out a given number is positive, negative or 0 |
 |18        | Grade.c | Grade.exe | Use else if ladder statements to find out the result grade from the percentage (Mentioned in file of the program) |
-|19        | Admission.c | Admission.exe | to find the eligibility of admission for a professional course based on the following criteria (Mentioned in file of the program) |
+|19        | Admission.c | Admission.exe | to find the eligibility of admission for a professional course based on the following criteria (Mentioned in file of the program) |
+|20        | QuadraticEquatic. | QuadraticEquatic.exe | WAP to calculate the root of a Quadratic Equation |

QuadraticEquation.c

@@ -0,0 +1,29 @@
+// WAP to calculate the root of a Quadratic Equation.
+
+void main() {
+    double a, b, c, discriminant, root1, root2, realPart, imagPart;
+    printf("Enter coefficients a, b and c: ");
+    scanf("%lf %lf %lf", &a, &b, &c);
+
+    discriminant = b * b - 4 * a * c;
+
+    // condition for real and different roots
+    if (discriminant > 0) {
+        root1 = (-b + sqrt(discriminant)) / (2 * a);
+        root2 = (-b - sqrt(discriminant)) / (2 * a);
+        printf("root1 = %.2lf and root2 = %.2lf", root1, root2);
+    }
+
+    // condition for real and equal roots
+    else if (discriminant == 0) {
+        root1 = root2 = -b / (2 * a);
+        printf("root1 = root2 = %.2lf;", root1);
+    }
+
+    // if roots are not real
+    else {
+        realPart = -b / (2 * a);
+        imagPart = sqrt(-discriminant) / (2 * a);
+        printf("root1 = %.2lf+%.2lfi and root2 = %.2f-%.2fi", realPart, imagPart, realPart, imagPart);
+    }
+}