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  1. # include<stdio.h>
  2. # include<math.h>
  3. void root(int a, int b, int c);
  4.  
  5. int main()
  6. {
  7.     int a, b, c;
  8.     scanf("%d%d%d", &a, &b, &c);
  9.     root(a, b, c);
  10.     return 0;
  11. }
  12.  
  13. void root(int a, int b, int c)
  14. {
  15.     double disc,x1,x2,p,q;
  16.     disc=b*b-4*a*c;
  17.     if(disc<0)
  18.         printf("此方程无解\n");
  19.     else{
  20.         p=-b/(2.0*a);
  21.         q=sqrt(disc)/(2.0*a);
  22.         x1=p+q;x2=p-q;
  23.         printf("x1=%.6f,x2=%.6f\n",x1,x2);
  24.     }
  25. }
Success #stdin #stdout 0.01s 5312KB
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stdin
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1 3 2
stdout
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x1=-1.000000,x2=-2.000000
https://ideone.com/57OYNN
language:
C (gcc 8.3)
created:
11 hours ago
visibility:
public

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