把%1f都改%lf，还有p=b*b-4*a*c;要放scanf后面，已改#include#includevoid main(){double a,b,c,p;double x1,x2;scanf("%lf%lf%lf",&a,&b,&c);p=b*b-4*a*c;//printf("please input%lf,%lf,%lf,%lf\n",a,b,c,p);x1=(-b+sqrt(p))/(2*a);x2=(-b-sqrt(p))/(2*a);printf("x1=%lf,x2=%lf\n",x1,x2);}...
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