下列程序的功能是计算机一元二次方程的根。
#include 【10】
#include ＜stdio.h＞
main ( )
float a, b, c, disc, x1, x2, realpart, imagpart;
scanf("%f%f%f",&a,&b,&c);
printf("The equation");
if( 【11】 ＜=1e-6)
printf(" is not quadratic\n");
else
disc=b*b-4*a*c;
if (fabs (disc) ＜=1e-6)
printf("has two equal roots:%-8.4f\n",-b/(2*a));
else if( 【12】 )
x1= (-b+sqrt (disc))/(2*a);
x2= (-b-sqrt (disc))/(2*a);
printf("has distinct real roots:%8.4f and %.4f\n",xl,x2);
else
realpart=-b/(2*a);
imagpart=sqrt (-disc)/(2*a);
printf("has complex roots:\n");
printf ("%8.4f+%. 4fi\n", realpart, imagpart);
printf ("%8.4f-%. 4fi\n", realpart, imagpart);
