1 #include <stdio.h> 2 #include <math.h> 3 int main() 4 { 5 double a=0; 6 double b=0; 7 double c=0; 8 scanf("%lf%lf%lf",&a,&b,&c); 9 if((b*b-4*a*c)>=0) 10 { 11 double r1=(-b+sqrt(b*b-4*a*c))/(2*a); 12 double r2=(-b-sqrt(b*b-4*a*c))/(2*a); 13 printf("r1=%7.2f\n",r1); 14 printf("r2=%7.2f",r2); 15 } 16 else{ 17 printf("No real roots!"); 18 } 19 20 return 0; 21 }