flow chart of C++ language for Quadratic Equation

 1 //++++++++++++++++++++++++++
 2  //      QuadraticEqu.cpp
 3  //++++++++++++++++++++++++++
 4  
 5  ///termino
 6  ///#include head file
 7  //#include <stdio.h> // C
 8  #include <iostream>
 9  #include <cmath>
10  
11  
12  ///USING
13  using namespace std;
14  
15  
16  ///main_entry
17  int main()
18  {
19      
20      
21      ///DECLARE
22          float a, b, c, x1, x2, iDiscx,iRealRoot,iImaRoot;
23      
24      
25      ///  Prompt & keyin
26          cout << "Enter  a=";
27          cin >> a;
28          cout << "Enter  b=";
29          cin >> b;
30          cout << "Enter  c=";
31          cin >>c;
32      
33      
34      ///calculate b2-4ac
35      iDiscx = b*b - 4*a*c;
36      
37      
38      
39      ///iDiscx > 0
40      if (iDiscx > 0)
41      {
42          
43          
44          ///different real root
45           x1 = (-b + sqrt(iDiscx)) / (2*a);
46           x2 = (-b - sqrt(iDiscx)) / (2*a);
47           cout << "Two different real roots." << endl;
48           cout << "x1 = " << x1 << endl;
49           cout << "x2 = " << x2 << endl;
50          
51          
52          /// +
53      }//end if
54      
55      
56      ///iDiscx = 0
57      else if (iDiscx == 0)
58      {
59          
60          
61          ///same real root
62           cout << "Roots are  same." << endl;
63           x1 = (-b + sqrt(iDiscx)) / (2*a);
64           cout << "x1 = x2 =" << x1 << endl;
65          
66          
67          /// +
68      }//end else if
69      
70      
71      ///iDiscx < 0
72       else
73      {
74          
75          
76          ///complex conjugate
77          iRealRoot = -b/(2*a);
78          iImaRoot =sqrt(-iDiscx)/(2*a);
79          cout << "Roots are complex conjugate."  << endl;
80          cout << "x1 = " <<iRealRoot << "+" <<iImaRoot << "i" << endl;
81          cout << "x2 = " <<iRealRoot << "-" <<iImaRoot << "i" << endl;
82          
83          
84          /// +
85      }//end else
86      
87      
88      ///main_end
89      return 0;
90  } //main_end
91  
92