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include <stdio.h>
#include <math.h>
/* Prototypes */
void realRoots(double, double, double);
void imaginaryRoots(double, double, double);
int main() {
/* Local variables */
int option;
double a, b, c, d;
printf(" Quadratic Equation ax^2+bx+c=0 \n");
printf("******************* *******************\n");
/* Print list */
printf("\n1) Real roots\n");
printf("2) Imaginary roots\n");
printf("3) Repeated roots\n");
printf("4) Exit\n");
scanf("%d", &option);
printf("************* *************************\n");
/* Get a, b, and c from user */
printf("\na = ");
scanf("%lf", &a);
printf("b = ");
scanf("%lf", &b);
printf("c = ");
scanf("%lf", &c);
/* Calculate determinant */
d = (b * b) - (4 * a * c);
/* Use switch statement */
switch(option) {
/* If 1 was selected */
case 1:
realRoots(a, b, sqrt(d));
break;
/* If 2 was selected */
case 2:
imaginaryRoots(a, b, sqrt(-d));
break;
/* If 3 was selected */
case 3:
break;
/* If 4 was selected */
case 4:
break;
}
/* End program */
return 0;
}
/* Evaluate real roots */
void realRoots(double a, double b, double d) {
/* Calculate */
double firstRoot = (-b/(2 * a)) + (d/(2 * a));
double secondRoot = (-b/(2 * a)) - (d/(2 * a));
/* Print */
printf("\nFirst Real Root: \t%lf\n", firstRoot);
printf("\nSecond Real Root: \t%lf\n", secondRoot);
}
/* Evaluate imaginary roots */
void imaginaryRoots(double a, double b, double d) {
/* Calculate */
double x = 2 * a;
double first_term = (-b)/x;
double second_term = (d)/x;
/* Print */
if(second_term >= 0) {
printf("\nFirst Imaginary Root: \t%lf + %lfi\n", first_term, second_term);
printf("\nSecond Imaginary Root: \t%lf - %lfi\n", first_term, second_term);
}else {
second_term = -(second_term);
printf("\nFirst Imaginary Root: \t%lf + %lfi\n", first_term, second_term);
printf("\nSecond Imaginary Root: \t%lf - %lfi\n", first_term, second_term);
}
}
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BeauPls try the following program.
#include <stdio.h>
#include <math.h>
/* Prototypes */
void realRoots(double, double, double);
void imaginaryRoots(double, double, double);
int main() {
/* Local variables */
int option;
double a, b, c, d;
printf(" Quadratic Equation ax^2+bx+c=0 \n");
printf("******************* *******************\n");
/* Print list */
printf("\n1) Real roots\n");
printf("2) Imaginary roots\n");
printf("3) Repeated roots\n");
printf("4) Exit\n");
/* Get option from user */
scanf("%d", &option);
printf("************* *************************\n");
/* Get a, b, and c from user */
printf("\na = ");
scanf("%lf", &a);
printf("b = ");
scanf("%lf", &b);
printf("c = ");
scanf("%lf", &c);
/* Calculate determinant */
d = (b * b) - (4 * a * c);
/* Use switch statement */
switch(option) {
/* If 1 was selected */
case 1:
realRoots(a, b, sqrt(d));
break;
/* If 2 was selected */
case 2:
imaginaryRoots(a, b, sqrt(-d));
break;
/* If 3 was selected */
case 3:
break;
/* If 4 was selected */
case 4:
break;
}
/* End program */
return 0;
}
/* Evaluate real roots */
void realRoots(double a, double b, double d) {
/* Calculate */
double firstRoot = (-b/(2 * a)) + (d/(2 * a));
double secondRoot = (-b/(2 * a)) - (d/(2 * a));
/* Print */
printf("\nFirst Real Root: \t%lf\n", firstRoot);
printf("\nSecond Real Root: \t%lf\n", secondRoot);
}
/* Evaluate imaginary roots */
void imaginaryRoots(double a, double b, double d) {
/* Calculate */
double x = 2 * a;
double first_term = (-b)/x;
double second_term = (d)/x;
/* Print */
if(second_term >= 0) {
printf("\nFirst Imaginary Root: \t%lf + %lfi\n", first_term, second_term);
printf("\nSecond Imaginary Root: \t%lf - %lfi\n", first_term, second_term);
}else {
second_term = -(second_term);
printf("\nFirst Imaginary Root: \t%lf + %lfi\n", first_term, second_term);
printf("\nSecond Imaginary Root: \t%lf - %lfi\n", first_term, second_term);
}
}
by Ford
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Write a Qbasic program to find the root of a quadratic equation using the formula if the result is less than 0 the program should print the root are immerginary and end the program?
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Write a c program to find the roots of a quadratic equation using if else?
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