hey guys..I'm new here,and I need some help in this program I'm making..

Can't understand..there are no syntax errors,however there are logical ones.Code://Program to show the nature of roots,solve,etcetc #include <iostream> #include <cstdio> #include <cstdlib> #include <windows.h> #include <cmath> #include <conio.h> using namespace std; void setcolor(unsigned short color) { HANDLE hcon = GetStdHandle(STD_OUTPUT_HANDLE); SetConsoleTextAttribute(hcon,color); } int main() { float a,x,b,c,alpha,beta,D; int y; alpha = (-b - sqrt(pow(b,2) - 4*a*c))/2*a ; beta = (-b + sqrt(pow(b,2) - 4*a*c))/2*a ; D = pow(b,2) - 4*a*c; cout << "\nWelcome to the Equation Solver!\n"; cout << "\nChoose one of the following -:\n"; cout << "\n1. Find a quadratic equation's nature of roots\n"; cout << "\n2. Find a quadratic equation's roots\n"; cout << "\n3. Establish the Viète relation of the roots and coefficients\n"; cout << "\n4. Quit,noobs >_>\n"; cin >> y; switch(y) { case 1: cout << "Enter coefficient 'a' - "; cin >> a; cout << "\n"; cout << "Enter coefficient 'b' - "; cin >> b; cout << "\n"; cout << "Enter constant 'c' - "; cin >> c; cout << "\n"; cout << "The equation is..\n"; cout << a << "x^2 +" << b << "x +" << c << endl; cout << "\n"; setcolor(8); if (D = 0) { cout << "The roots of this equation are real and equal!"; } if (D > 0) { cout << "The roots of this equation are real and unequal!"; } if (D < 0) { cout << "There are no roots to this equation.."; } setcolor(7); system("PAUSE"); break; case 2: cout << "Enter coefficient 'a' - "; cin >> a; cout << "\n"; cout << "Enter coefficient 'b' - "; cin >> b; cout << "\n"; cout << "Enter constant 'c' - "; cin >> c; cout << "\n"; cout << "The equation is.."; cout << a << "x^2 +" << b << "x +" << c << endl; cout << "\n"; cout << "And the solutions are as follows -:\n"; setcolor(14); cout << "x = " << alpha << endl; cout << "x = " << beta << endl; setcolor(7); system("PAUSE"); break; case 3: cout << "Enter coefficient 'a' - "; cin >> a; cout << "\n"; cout << "Enter coefficient 'b' - "; cin >> b; cout << "\n"; cout << "Enter constant 'c' - "; cin >> c; cout << "\n"; cout << "The equation is.."; cout << a << "x^2 +" << b << "x +" << c << endl; cout << "\n"; setcolor(8); cout << "The sum of the roots is " << alpha + beta << endl; cout << "The value of -b/a is " << -b/a << endl; cout << "The product of the roots is " << alpha * beta << endl; cout << "The value of c/a is " << c/a << endl; setcolor(7); system("PAUSE"); break; case 4: break; default: "Enter a number in the list\n";break; } return 0; }

In case 1, the Discriminant outputs(The ones with D) don't come.

In case 2, the equations always solve to some retarded value(lol?)

Case 3 doesn't work at all...