✨ finished assignment 2.2

assignments/02/02_1.cpp

@@ -15,7 +15,7 @@ int guess(int to_guess) {
     int guess_number;
     int check = check_number(guess, &guess_number);
     if (check < 0) {
-        std::cout << "Something seems to have went wrong." << std::endl;
+        std::cout << "Something went wrong. :/" << std::endl;
         return check;
     }
     if (!(guess_number == to_guess)) {

assignments/02/02_2.cpp

@@ -0,0 +1,39 @@
+#include <iostream>
+#include <cmath>
+
+int check_number(std::string number, double* checked_number) {
+    std::size_t pos;
+    *checked_number = std::stoi(number, &pos); // how to properly type check? or is that not necessary?
+    return 0;
+}
+
+int main(int argc, char *argv[]) {
+    if (argc < 4) {
+        std::cout << "No/Not enough parameters given." << std::endl;
+        return -1;
+    }
+    double a, b, c;
+    int check = check_number(argv[1], &a) & check_number(argv[2], &b) & check_number(argv[3], &c);
+    if (check < 0) {
+        std::cout << "Something went wrong. :/" << std::endl;
+        return check;
+    }
+    double p = b/a;
+    double q = c/a;
+    
+    double w = (p*p / 4) - q;
+    if (w < 0) {
+        std::cout << "No real solutions." << std::endl;
+        return 0;
+    }
+    
+    double x_1 = -(p / 2) + sqrt(w);
+    double x_2 = -(p / 2) - sqrt(w);
+    
+    if (x_1 == x_2)
+        std::cout << "Double zero at x = " << x_1 << std::endl;
+    else
+        std::cout << "Zeroes found at x_1 = " << x_1 << " and x_2 = " << x_2 << std::endl;
+    
+    return 0;
+}

assignments/02/CMakeLists.txt

@@ -2,4 +2,4 @@ cmake_minimum_required(VERSION 3.11.4)
 project (01)
 
 add_executable(02_1 02_1.cpp)
-#add_executable(01_2 01_2.cpp)
+add_executable(02_2 02_2.cpp)