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  1. #include <stdio.h>
  2. #include <math.h>
  3. #include <ctype.h>
  4.  
  5.  
  6.  
  7. double quad_formula(double a, double b, double c){
  8.  
  9.     double add_solution,sub_solution;
  10.  
  11.     add_solution = (-b + sqrt((b * b) - (4*(a * c)) ))/(2 *a);
  12.     sub_solution = (-b - sqrt((b * b) - (4*(a * c)) ))/(2 *a);
  13.  
  14.     if (!isnan(add_solution) && !isnan(sub_solution)){
  15.         if(add_solution = sub_solution){
  16.             printf("There is one real solution: %.2lf", add_solution);
  17.         }else{
  18.             printf("There are 2 real solutions\n");
  19.             printf("Solution 1: %.2lf", add_solution);
  20.             printf("Solution 2: %.2lf", sub_solution);
  21.         }
  22.  
  23.     }else if(!isnan(add_solution)){
  24.         printf("There is one real solution: %.2lf", add_solution);
  25.  
  26.     }else if(!isnan(sub_solution)){
  27.         printf("There is one real solution: %.2lf", sub_solution);
  28.  
  29.     }else{
  30.         printf("There are no real solutions");
  31.     }
  32.  
  33.     return 0.0;
  34. }
  35.  
  36. int main() {
  37.     double a,b,c;
  38.     printf("Given a quadratic equation of the form a*x^2 + b * x + c\n");
  39.     printf("Please enter a:");
  40.     scanf("%lf", &a);
  41.     printf("Please enter b:");
  42.     scanf("%lf", &b);
  43.     printf("Please enter c:");
  44.     scanf("%lf", &c);
  45.     quad_formula(a,b,c);
  46.  
  47.  
  48.     return 0;
  49. }
Success #stdin #stdout 0.01s 5284KB
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Given a quadratic equation of the form a*x^2 + b * x + c
Please enter a:Please enter b:Please enter c:There are no real solutions
https://ideone.com/6BZPB6
language:
C++14 (gcc 8.3)
created:
11 days ago
visibility:
public

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