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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. int main() {
  5.     float a, b, c, delta, x1, x2;
  6.     printf("Nhap a, b, c: ");
  7.     scanf("%f%f%f", &a, &b, &c);
  8.  
  9.     if (a == 0) {
  10.         if (b == 0) {
  11.             if (c == 0)
  12.                 printf("Phuong trinh co vo so nghiem\n");
  13.             else
  14.                 printf("Phuong trinh vo nghiem\n");
  15.         } else {
  16.             printf("Phuong trinh bac nhat, x = %.2f\n", -c / b);
  17.         }
  18.     } else {
  19.         delta = b*b - 4*a*c;
  20.         if (delta < 0)
  21.             printf("Phuong trinh vo nghiem\n");
  22.         else if (delta == 0)
  23.             printf("Phuong trinh co nghiem kep x = %.2f\n", -b / (2*a));
  24.         else {
  25.             x1 = (-b + sqrt(delta)) / (2*a);
  26.             x2 = (-b - sqrt(delta)) / (2*a);
  27.             printf("Phuong trinh co 2 nghiem:\n");
  28.             printf("x1 = %.2f\n", x1);
  29.             printf("x2 = %.2f\n", x2);
  30.         }
  31.     }
  32.     return 0;
  33. }
  34.  
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
Standard input is empty
stdout 
Nhap a, b, c: Phuong trinh co nghiem kep x = -40649687908220928.00
https://ideone.com/BspEcF
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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