C++ problem wrapper

.vscode/launch.json

@@ -1,27 +1,58 @@
 {
-    // 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": "Run LeetCode Solution",
-            "type": "python",
-            "request": "launch",
-            "program": "${file}",
-            "console": "integratedTerminal",
-            "cwd": "${workspaceFolder}"
-        },
-        {
-            "name": "Run All Tests",
-            "type": "python",
-            "request": "launch",
-            "program": "${workspaceFolder}/run_all_tests.py",
-            "args": [
-                "test-results.xml" 
-            ],
-            "console": "integratedTerminal",
-            "cwd": "${workspaceFolder}"
-        }
-    ]
+	"version": "0.2.0",
+	"inputs": [
+		{
+			"id": "problemNumber",
+			"description": "Enter the 3-digit problem number to DEBUG:",
+			"default": "001",
+			"type": "promptString"
+		}
+	],
+	"configurations": [
+		{
+			"name": "C++: Run All Tests",
+			"type": "cppdbg",
+			"request": "launch",
+			"program": "C:/Windows/System32/cmd.exe",
+			"preLaunchTask": "Run All Tests",
+			"console": "integratedTerminal",
+			"cwd": "${workspaceFolder}/c++"
+		},
+		{
+			"name": "C++: Debug Single Problem",
+			"type": "cppdbg",
+			"request": "launch",
+			"program": "${workspaceFolder}/c++/build/problem_${input:problemNumber}/runner.exe",
+			"args": [
+				"-f",
+				"problems/problem_${input:problemNumber}/problem_${input:problemNumber}.json"
+			],
+			"stopAtEntry": false,
+			"cwd": "${workspaceFolder}/c++",
+			"MIMode": "gdb",
+			"miDebuggerPath": "C:/msys64/ucrt64/bin/gdb.exe",
+			// This is the only change: point to the new build task
+			"preLaunchTask": "C++: Build active problem for debugger",
+			"console": "integratedTerminal"
+		},
+		{
+			"name": "Python: Run Active File",
+			"type": "python",
+			"request": "launch",
+			"program": "${file}",
+			"console": "integratedTerminal",
+			"cwd": "${fileDirname}"
+		},
+		{
+			"name": "Python: Run All Tests",
+			"type": "python",
+			"request": "launch",
+			"program": "${workspaceFolder}/run_all_tests.py",
+			"args": [
+				"test-results.xml"
+			],
+			"console": "integratedTerminal",
+			"cwd": "${workspaceFolder}"
+		}
+	]
 }

.vscode/tasks.json

@@ -0,0 +1,69 @@
+{
+	"version": "2.0.0",
+	"inputs": [
+		{
+			"id": "problemNumber",
+			"description": "Enter the 3-digit problem number to build:",
+			"default": "001",
+			"type": "promptString"
+		}
+	],
+	"tasks": [
+		{
+			"label": "C++: Build active problem for debugger",
+			"type": "process",
+			"command": "C:/msys64/ucrt64/bin/g++.exe",
+			"args": [
+				"-g",
+				"-std=c++20",
+				"-Wall",
+				// --- Include Paths ---
+				"-IC:/msys64/ucrt64/include",
+				// CORRECTED: Added "problem_" prefix
+				"-Iproblems/problem_${input:problemNumber}",
+				"-Itests_runner",
+				// --- Source Files ---
+				"tests_runner/tests_runner.cpp",
+				// CORRECTED: Added "problem_" prefix
+				"problems/problem_${input:problemNumber}/solution.cpp",
+				// --- Output File ---
+				"-o",
+				"build/problem_${input:problemNumber}/runner.exe",
+				// --- Linker Flags ---
+				"-LC:/msys64/ucrt64/lib",
+				"-ljsoncpp",
+				"-static-libstdc++",
+				"-static-libgcc"
+			],
+			"options": {
+				"cwd": "${workspaceFolder}/c++"
+			},
+			"problemMatcher": ["$gcc"],
+			"group": "build"
+		},
+		{
+			"label": "Run All Tests",
+			"type": "process",
+			"command": "C:/msys64/usr/bin/bash.exe",
+			"args": [
+				"-ic",
+				"cd \"$(cygpath '${workspaceFolder}')/c++\" && make clean && make test-all"
+			],
+			"options": {
+				"env": {
+					"PATH": "C:\\msys64\\ucrt64\\bin;C:\\msys64\\usr\\bin;${env:PATH}"
+				}
+			},
+			"group": {
+				"kind": "test",
+				"isDefault": true
+			},
+			"presentation": {
+				"reveal": "always",
+				"panel": "dedicated",
+				"clear": true
+			},
+			"problemMatcher": ["$gcc"]
+		}
+	]
+}

c++/.gitignore

@@ -0,0 +1 @@
+*.exe

c++/Makefile

@@ -0,0 +1,35 @@
+# --- Compiler and Flags ---
+CXX := C:/msys64/ucrt64/bin/g++.exe
+CXXFLAGS := -O2 -std=c++20 -g -Wall -IC:/msys64/ucrt64/include
+# Add the -static-libgcc flag to this line
+LDFLAGS := -LC:/msys64/ucrt64/lib -ljsoncpp -static-libstdc++ -static-libgcc
+
+# --- Project Structure ---
+BUILD_DIR := build
+TEST_RUNNER_SRC := tests_runner/tests_runner.cpp
+
+# --- Auto-discovery of Problems ---
+PROBLEM_DIRS := $(wildcard problems/problem_*)
+PROBLEM_NUMS := $(patsubst problems/problem_%,%,$(PROBLEM_DIRS))
+
+# --- Main Targets ---
+.PHONY: test-all
+test-all: $(addprefix test-, $(PROBLEM_NUMS))
+	@echo ""
+	@echo "✅ All tests completed."
+
+.PHONY: test-%
+test-%: $(BUILD_DIR)/problem_%/runner.exe
+	@echo "--- Running tests for Problem $* ---"
+	@$(BUILD_DIR)/problem_$*/runner.exe -f problems/problem_$*/problem_$*.json
+
+# --- Build Rules ---
+$(BUILD_DIR)/problem_%/runner.exe: $(TEST_RUNNER_SRC) problems/problem_%/solution.cpp
+	@mkdir -p $(@D)
+	$(CXX) $(CXXFLAGS) -Iproblems/problem_$* -Itests_runner $^ -o $@ $(LDFLAGS)
+
+# --- Utility Targets ---
+.PHONY: clean
+clean:
+	@echo "Cleaning build directory..."
+	@rm -rf $(BUILD_DIR)

c++/hello_world/hello_world.cpp

@@ -0,0 +1,16 @@
+#include <iostream>
+#include <vector>
+#include <string>
+
+using namespace std;
+
+int main()
+{
+    vector<string> msg {"Hello", "C++", "World", "from", "VS Code", "and the C++ extension!"};
+
+    for (const string& word : msg)
+    {
+        cout << word << " ";
+    }
+    cout << endl;
+}

c++/problems/problem_001/problem_001.json

@@ -0,0 +1,26 @@
+{
+    "method": "twoSum",
+    "tests": [
+        {
+            "Input": {
+                "nums": "[2,7,11,15]",
+                "target": "9"
+            },
+            "Output": "[0,1]"
+        },
+        {
+            "Input": {
+                "nums": "[3,2,4]",
+                "target": "6"
+            },
+            "Output": "[1,2]"
+        },
+            {
+            "Input": {
+                "nums": "[3,3]",
+                "target": "6"
+            },
+            "Output": "[0,1]"
+        }
+    ]
+}

c++/problems/problem_001/solution.cpp

@@ -0,0 +1,23 @@
+#include "solution.hpp"
+
+// Standard LeetCode solution for Two Sum
+std::vector<int> Solution::twoSum(std::vector<int>& nums, int target) {
+    // Input: nums = [2,7,11,15], target = 9
+    // Output: [0,1]
+    // Explanation: Because nums[0] + nums[1] == 9, we return [0, 1].
+
+    for(auto it=nums.begin(); it != nums.end(); ++it){
+        for(auto j=(it + 1); j != nums.end(); ++j){
+            if(*it + *j == target) {
+                auto retval = std::vector<int>();
+                int index = std::distance(nums.begin(), it);
+                int index2 = std::distance(nums.begin(), j);
+                retval.push_back(index);
+                retval.push_back(index2);
+                return retval;
+            }
+        }
+    }
+
+    return std::vector<int>(); // Should not happen for valid inputs
+}

c++/problems/problem_001/solution.hpp

@@ -0,0 +1,11 @@
+#ifndef SOLUTION_HPP_
+#define SOLUTION_HPP_
+
+#include <vector>
+
+class Solution {
+public:
+    std::vector<int> twoSum(std::vector<int>& nums, int target);
+};
+
+#endif // SOLUTION_HPP_