still trying to read user input

.vscode/launch.json

@@ -0,0 +1,12 @@
+{
+    "configurations": [
+        {
+            "type": "cmake",
+            "request": "launch",
+            "name": "Debug portfile(s)",
+            "cmakeDebugType": "external",
+            "pipeName": "/tmp/vcpkg_ext_portfile_dbg",
+            "preLaunchTask": "Debug vcpkg commands"
+        }
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,10 @@
+{
+    "vcpkg.target.defaultTriplet": "x64-linux",
+    "vcpkg.target.hostTriplet": "x64-linux",
+    "vcpkg.target.useManifest": false,
+    "vcpkg.target.useStaticLib": false,
+    "cmake.configureArgs": [
+        "-DVCPKG_MANIFEST_MODE=OFF",
+        "-DVCPKG_TARGET_TRIPLET=x64-linux"
+    ]
+}

.vscode/tasks.json

@@ -0,0 +1,28 @@
+{
+    "tasks": [
+        {
+            "type": "cppbuild",
+            "label": "C/C++: gcc build active file",
+            "command": "/usr/bin/gcc",
+            "args": [
+                "-fdiagnostics-color=always",
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}/${fileBasenameNoExtension}"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "Task generated by Debugger."
+        }
+    ],
+    "version": "2.0.0"
+}

puzzle1.c

@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#define stringSize 20
+
+int listSize = 0;
+char readChar = '0';
+char stringOne[stringSize];
+char stringTwo[stringSize];
+
+int readIntoList(char* stringList){
+  int index = 0;
+
+    while (getchar()=='\n'){
+        //eat up new lines in buffer
+    }
+    
+    while (1) {
+        readChar = getchar();
+        stringList[index] = readChar;
+        if (readChar == '\n' || index == stringSize-1) {
+            break;
+        }
+    index++;
+    }
+}
+
+int main(){
+    printf("enter list size: \n");
+
+    scanf("%i", &listSize);
+    int listOne[listSize];
+    int listTwo[listSize];
+
+    memset (listOne, '\0', listSize);
+    memset (listTwo, '\0', listSize);
+    printf ("enter list 1: \n");
+    readIntoList (stringOne);
+    printf ("enter list 2: \n");
+    readIntoList (stringTwo);
+
+    printf ("one: %s \ntwo: %s ",stringOne,stringTwo);
+}