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  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5. int main() {
  6.     double a, b, c, x1, x2, x3, x4, t1, t2, d, D; bool log=false;
  7.     cin>>a;
  8.     cin>>b;
  9.     cin>>c;
  10.     if (a==0) {
  11.     	if (b!=0) {
  12.     		if (c==0) {cout<<"X=0";} 
  13.     		else {
  14.     			if (c/b<0){
  15.     			x1=sqrt(-(c/b));
  16. 				x2=-sqrt(-(c/b));
  17. 				cout<<"X1="<<x1<<"; X2="<<x2;
  18.     			}
  19.     			else {cout<<"Нет решений";}
  20.     		}
  21.     	}
  22.     	else {
  23.     		if (c!=0) {cout<<"Нет решений";}
  24.     		else {cout<<"X любое";}
  25.  
  26.     	}
  27.     }
  28.     else{
  29.     	D = (b * b - 4 * a * c);
  30.     	if (D<0) {cout<<"Нет решений";}
  31.     	else {
  32. 		    d=sqrt(D);
  33. 		    t1=( - b + d )/2.0 / a;
  34. 		    t2=( - b - d )/2.0 / a; 
  35. 		    if (t1>0){
  36. 			    x1=sqrt(t1);
  37. 			    x2=-sqrt(t1);
  38. 			    cout<<"X1="<<x1<<"; X2="<<x2<<"; ";
  39. 			    log = true;
  40. 		    }
  41. 		    if (t2>0){
  42. 			    x3=sqrt(t2);
  43. 			    x4=-sqrt(t2);
  44. 			    if (log == true){cout<<"X3="<<x3<<"; X4="<<x4<<";";}
  45. 			    if (log == false){cout<<"X1="<<x3<<"; X2="<<x4<<";";}
  46. 		    }
  47.     	}
  48.     }
  49. }
Success #stdin #stdout 0s 3464KB
comments (?)
stdin
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-5 22 -6
stdout
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X1=0.540483; X2=-0.540483; X3=2.02679; X4=-2.02679;
https://ideone.com/By6f3b
a*x^4 b*x^2 c=0
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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