2 files changed, 76 insertions, 27 deletions
diff --git a/xsc.cpp b/xsc.cpp
new file mode 100644
index 0000000..63004b0
--- /dev/null
+++ b/xsc.cpp
@@ -0,0 +1,76 @@
+#include <iostream>
+#include <string>
+#include <cmath>
+using namespace std;
+
+void usage() {
+    // Prints usage message (help)
+    system("figlet XSC | lolcat");
+    cout << "\neXtremelySimpleCalculator usage:\n"
+    << "`xsc --help | -h` for help\n"
+    << "`xsc <number> <(+|-|*|/|%|^)> <number>` for mathematical operation\n"
+    << "`xsc -sqrt | -r <number>` for square root operation\n"
+    << "\n[n!] `xsc` doesn't support mathematical expressions (to-do)\n";
+}
+
+int main(int argc, char* argv[]) {
+    // AAAAAAAAAA (a.k.a. argument validation and execution)
+    for (int i = 1; i < argc; ++i) {
+        string arg = argv[i];
+
+        if (arg == "--sqrt" || arg == "-r") {
+        }
+        else if (arg == "--help" || arg == "-h") {
+            usage();
+            return 0;
+        }
+        else if (i + 2 < argc) {
+            string op = argv[i + 1];
+            double num1 = stod(argv[i]);
+            double num2 = stod(argv[i + 2]);
+            double result;
+
+            if (op == "+") {
+                result = num1 + num2;
+            }
+            else if (op == "-") {
+                result = num1 - num2;
+            }
+            else if (op == "*") {
+                result = num1 * num2;
+            }
+            else if (op == "/") {
+                if (num2 != 0) {
+                    result = num1 / num2;
+                }
+                else {
+                    cout << "[math_e!] division by zero!\n";
+                    usage();
+                    return 1;
+                }
+            }
+            else if (op == "%") {
+                result = fmod(num1, num2);
+            }
+            else if (op == "^") {
+                result = pow(num1, num2);
+            }
+            else {
+                cout << "[e!] invalid operator!\n";
+                usage();
+                return 1;
+            }
+            // show result :)
+            cout << result << "\n";
+            return 0;
+        }
+        else {
+            cout << "[e!] invalid input!\n";
+            usage();
+            return 1;
+        }
+
+    }
+
+    return 0;
+}
diff --git a/xsc_debug.cpp b/xsc_debug.cpp
deleted file mode 100644
index 16d3745..0000000
--- a/xsc_debug.cpp
+++ /dev/null
@@ -1,27 +0,0 @@
-#include <iostream>
-#include <cmath>
-using namespace std;
-
-void usage() {
-    // Prints usage message (help)
-    system("figlet XSC | lolcat");
-    cout << "\neXtremelySimpleCalculator usage:\n"
-    << "`xsc --help | -h` for help\n"
-    << "`xsc <number> <(+|-|*|/|%|^)> <number>`\n";
-}
-
-int main(int argc, char* argv[]) {
-    if (argc > 1 && (argv[1] == "--help" || argv[1] == "-h")) {
-        usage();
-        return 0;
-    }
-    else {
-        if (argc > 1 && argv[2][0] == '+') { cout << atof(argv[1]) + atof(argv[3]); }
-        else if (argv[2][0] == '-') { cout << atof(argv[1]) - atof(argv[3]); }
-        else if (argv[2][0] == '*') { cout << atof(argv[1]) * atof(argv[3]); }
-        else if (argv[2][0] == '/') { cout << atof(argv[1]) / atof(argv[3]); }
-        else if (argv[2][0] == '%') { cout << fmod(atof(argv[1]), atof(argv[3])); }
-        else if (argv[2][0] == '^') { cout << pow(atof(argv[1]), atof(argv[3]));  }
-    }
-    return 0;
-}