Write a C program to calculate the roots of a quadratic equation.
#include <math.h>
int main() {
int a, b, c, temp;
float proot, nroot;
printf("aX^2 - bX + c\n");
printf("Enter your value for a, b and c:");
/* get the input from user */
scanf("%d%d%d", &a, &b, &c);
temp = (b * b) - (4 * a * c);
if (temp < 0) {
printf("Imaginary root\n");
return 0;
}
/* positive root calculation */
proot = (-b + sqrt(temp)) / (2.0 * a);
/* negative root calculation */
nroot = (-b - sqrt(temp)) / (2.0 * a);
/* result */
printf("roots of the given quadratic equations:\n");
printf("%.2f %.2f\n", proot, nroot);
return 0;
}
Note: gcc roots.c -lm => link math library for sqrt() function.
Output:
jp@jp-VirtualBox:~/$ ./a.out
aX^2 - bX + c
Enter your value for a, b and c:1 -4 4
roots of the given quadratic equations:
2.00 2.00
aX^2 - bX + c
Enter your value for a, b and c:1 -4 4
roots of the given quadratic equations:
2.00 2.00
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