read each element of a line

.vscode/tasks.json

@@ -3,8 +3,10 @@
         {
             "type": "cppbuild",
             "label": "C/C++: gcc build active file",
-            "command": "/usr/bin/gcc",
+            "command": "/usr/bin/g++",
             "args": [
+                "--std",
+                "gnu++23",
                 "-fdiagnostics-color=always",
                 "-g",
                 "${file}",

2/puzzle2.cpp

@@ -0,0 +1,33 @@
+#include <stdio.h>
+#include <list>
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+#include <sstream>
+
+using namespace std;
+
+int main(){
+
+    list<int> currntlevels{};
+    string line;
+    int safeReports = 0;
+
+    ifstream puzzle("input.txt", ifstream::in);
+
+        while (getline(puzzle, line)) {
+            istringstream lineStream(line);
+            string number;
+            cout << "{";
+            while (getline(lineStream, number, ' ')) {
+                cout << number<<"|";
+            }
+            cout << "}";
+        }
+/*
+    for (line; !puzzle.eof();puzzle.getline(line,'\n')) {
+        cout << line << "\n";
+    }
+*/
+}