C Language Example - Quadratic Equation
C Language ExamplesSolve the quadratic equation:ax2+bx+c=0the roots.
Enter the values of three real numbers a, b, c, with a not equal to 0.
Example
#include <stdio.h>
#include <math.h>
int main()
{
float a,b,c,x1,x2,d;
printf("Input the three coefficients of the equation:");
scanf("%f %f %f",&a,&b,&c);
if(a!=0)
{
d=sqrt(b*b-4*a*c);
x1=(-b+d)/(2*a);
x2=(-b-d)/(2*a);
if(x1<x2)
printf("%0.2f %0.2f\n",x2,x1);
else
printf("%0.2f %0.2f\n",x1,x2);
}
return 0;
}
Run result:
输入方程的三个系数:1 2 1 -1.00 -1.00other extensions