例4.9

#include<math.h> int main() { double a,b,c,disc,x1,x2,realpart,imagpart; scanf("%if,%if,%if",&a,&b,&c); printf("The equation"); if(fabs(a)<=1e-6) printf("is not a quadratic\n"); else {disc=b*b-4*a*c;

>>阅读原文<<