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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. typedef struct Q {
  5.  
  6.         float a, 
  7.               b,
  8.               c; 
  9.  
  10. } E;
  11.  
  12. float computeDelta(float a, float b, float c) {
  13.  
  14.       return b*b - 4*a*c; 
  15. }
  16.  
  17. void displayEq(float a, float b, float c) {
  18.  
  19.      printf("%3.3f*x^2 + %3.3f*x +  %3.3f = 0\n", a, b, c); 
  20. }
  21.  
  22. int main() {
  23.  
  24.     E q;
  25.     float D;
  26.     printf("a,b,c=?");
  27.     scanf("%f %f %f", &q.a, &q.b, &q.c);
  28.  
  29.     D = computeDelta(q.a,q.b,q.c); 
  30.  
  31.     displayEq(q.a, q.b, q.c);
  32.  
  33.     if(D < 0) printf("%s\n", "Equation do not have real solutions.");
  34.  
  35.         else if(D == 0) printf("x1 = x2 = %3.3f\n", -q.b/2*q.a);
  36.  
  37.              else if(D > 0) {
  38.  
  39.                      float x1, x2;
  40.                      x1 = (-q.b + sqrt(D))/(2*q.a);  
  41.                      x2 = (-q.b - sqrt(D))/(2*q.a);
  42.                      printf("x1 = %3.3f x2 =%3.3f\n", x1, x2);  
  43.              } 
  44.  
  45.     return(0);
  46. }
Success #stdin #stdout 0s 4488KB
comments (?)
stdin 
2.340 4.670 0.320
stdout 
a,b,c=?2.340*x^2 + 4.670*x +  0.320 = 0
x1 = -0.071 x2 =-1.925
https://ideone.com/imJbsP
Quadratic Equation
language:
C (gcc 8.3)
created:
4 years ago
visibility:
secret

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