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Update quadratic.cpp #67

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24 changes: 13 additions & 11 deletions 2-variables/quadratic-formula/quadratic.cpp
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Original file line number Diff line number Diff line change
@@ -1,26 +1,28 @@
#include <iostream>
// Quadratic formula
#include <iostream>
#include <cmath>

int main() {
int main(){
// 1. declare variable a,b,c
double a,b,c;

double a, b, c;
double root1, root2;

std::cout << "Enter a: ";
//2,3 Input a,b,c
std::cout << "Enter a : ";
std::cin >> a;

std::cout << "Enter b: ";
std::cout << "Enter b : ";
std::cin >> b;

std::cout << "Enter c: ";
std::cout << "Enter c : ";
std::cin >> c;

// 4. declare two variable root1 and root2
double root1, root2;

// 5. formula of root1
root1 = (-b + std::sqrt(b*b - 4*a*c)) / (2*a);
root2 = (-b - std::sqrt(b*b - 4*a*c)) / (2*a);

std::cout << "Root 1 is " << root1 << "\n";
std::cout << "Root 2 is " << root2 << "\n";

return 0;

}