编写一程序,在复数域计算一元二次方程的所有根,要求a,b,c为实数,数据...答:include <stdio.h>#include <stdlib.h>#include <math.h> int main() { double a,b,c,x1,x2,h,deta; scanf("%lf %lf %lf",&a,&b,&c);deta=b*b-4*a*c; if(deta==0){ h=-b/(2*a); printf("x1=x2=%.3lf\n",h); } else if(deta>0){ ...