added vscode sample launch and task

.vscode/launch.json

@@ -0,0 +1,31 @@
+{
+    // 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": "C++ Launch",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/dummy",
+            "args": ["arg1", "arg2"],
+            "environment": [{ "name": "config", "value": "Debug" }],
+            "cwd": "${workspaceFolder}",
+            "stopAtEntry": false,
+
+            "launchCompleteCommand": "exec-run",
+            "linux": {
+              "MIMode": "gdb",
+              "miDebuggerPath": "/usr/bin/gdb"
+            },
+            "osx": {
+              "MIMode": "lldb"
+            },
+            "windows": {
+              "MIMode": "gdb",
+              "miDebuggerPath": "C:\\MinGw\\bin\\gdb.exe"
+            }
+          }
+      ]
+}

.vscode/tasks.json

@@ -0,0 +1,20 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+      {
+        "type": "shell",
+        "label": "C/C++: g++ build active file",
+        "command": "/usr/bin/g++",
+        "args": ["-g", "${file}", "-o", "${fileDirname}/${fileBasenameNoExtension}"],
+        "options": {
+          "cwd": "/usr/bin"
+        },
+        "problemMatcher": ["$gcc"],
+        "group": {
+          "kind": "build",
+          "isDefault": true
+        },
+        "detail": "Task generated by Debugger."
+      }
+    ]
+  }