first semester files

1st-Semester-Fall-2021/CSNP/FISR/.vscode/launch.json

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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "g++.exe - Build and debug active file",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${fileDirname}",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "miDebuggerPath": "C:\\Program Files (x86)\\mingw-w64\\i686-8.1.0-posix-dwarf-rt_v6-rev0\\mingw32\\bin\\gdb.exe",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ],
+            "preLaunchTask": "C/C++: g++.exe build active file"
+        }
+    ]
+}

1st-Semester-Fall-2021/CSNP/FISR/.vscode/tasks.json

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+{
+    "tasks": [
+        {
+            "type": "cppbuild",
+            "label": "C/C++: g++.exe build active file",
+            "command": "C:\\Program Files (x86)\\mingw-w64\\i686-8.1.0-posix-dwarf-rt_v6-rev0\\mingw32\\bin\\g++.exe",
+            "args": [
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}\\${fileBasenameNoExtension}.exe"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "Task generated by Debugger."
+        }
+    ],
+    "version": "2.0.0"
+}

1st-Semester-Fall-2021/CSNP/FISR/fisr.cpp

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+#include <iostream>
+#include <string>
+
+using namespace std;
+
+float Q_rsqrt( float number )
+{
+    long i;
+    float x2, y;
+    const float threehalfs = 1.5F;
+
+    x2 = number * 0.5F;
+    y = number;
+    i = * ( long * ) &y;                        // evil floating point bit level hacking
+    i = 0x5f3759df - ( i >> 1 );                // what the fuck
+    y = * ( float * ) &i;                       
+    y = y * ( threehalfs - ( x2 * y * y ) );    // 1st iteration
+    y = y * ( threehalfs - ( x2 * y * y ) );    // 2nd iteration, can be removed
+
+    return y;
+}
+
+int main()
+{
+    int number;
+    cin >> number;
+    cout << Q_rsqrt( number );
+    return 0;
+}