老区汽油分馏塔热油系统在正常操作时应注意什么问题？

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");elsedisc=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);} }