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#define _CRT_SECURE_NO_WARNINGS #include <math.h> #include <stdio.h> int main(void) { int a, b, c; float delta, x1, x2, absdelta, re1, re2, im1, im2; // creating a variables printf("This program will solve the quadratic equation of the form: "); // intro printf("ax^2+bx+c=0\n"); printf(" \n"); // just a gap printf("Enter the value of a here: "); // asking for the value of a scanf("%d", &a); printf("Enter the value of b here: "); // asking for the value of b scanf("%d", &b); printf("Enter the value of c here: "); // asking for the value of c scanf("%d", &c); if (a == 0) { if (b == 0) { // linear equation if (c == 0) { printf("\n"); printf("x can be any number"); } else { printf("\n"); printf("there is no solution"); } } else { printf("\n"); printf("x = %f\n", -(float)c / b); } } else { printf("\n"); // just a gap delta = pow((float)b, 2) - 4 * (float)a * (float)c; // computing the discriminant printf("The discriminant is: %f\n", delta); // printing the discriminant value printf("\n"); // just a gap if (delta > 0) { // checking the value of discriminant (>0) x1 = ((-(float)b + sqrt(delta)) / (2 * (float)a)); // computing the first root x2 = ((-(float)b - sqrt(delta)) / (2 * (float)a)); // computing the second root printf("The roots are: %f and %f\n", x1, x2); // printing the roots } if (delta == 0) { // checking the value of discriminant (=0) x1 = ((-(float)b + sqrt(delta)) / (2 * (float)a)); // computing the root printf("The root is: %f\n", x1); // printing the root } if (delta < 0) { // checking the value of discriminant (<0) absdelta = delta * (-1); // computing the absolute value of diccriminant re1 = (-(float)b / (2 * (float)a)); // computing the real parts of the roots re2 = (-(float)b / (2 * (float)a)); im1 = (sqrt(absdelta) / (2 * (float)a)); // computing the imaginary parts of the roots im2 = (-sqrt(absdelta) / (2 * (float)a)); printf("The roots are: %f + %fi and %f + %fi\n", re1, re2, im1, im2); // printing the roots } } printf(" \n"); // just a gap // printf("by queth"); // printing my nickname return 0; }
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