Hello and editor

lab1/editor.cc

@@ -6,11 +6,29 @@ using std::string;
 
 using size_type = Editor::size_type;
 
-size_type Editor::get_size() const
-{
-    return text.size();
-}
+size_type Editor::get_size() const { return text.size(); }
 
-size_type Editor::find_left_par(size_type pos) const {
-    return string::npos;
+Editor::size_type Editor::find_left_par(size_type pos) const {
+    char right_par = text[pos];
+    char left_par;
+
+    // Determine the matching left parenthesis for the given right parenthesis
+    switch (right_par) {
+        case ')': left_par = '('; break;
+        case ']': left_par = '['; break;
+        case '}': left_par = '{'; break;
+        default: return string::npos; // Not a valid right parenthesis
+    }
+
+    int balance = 1; // Start with the right parenthesis at text[pos]
+    for (size_type i = pos; i-- > 0;) {
+        if (text[i] == left_par) {
+            balance--;
+            if (balance == 0) return i; // Found the matching left parenthesis
+        } else if (text[i] == right_par) {
+            balance++;
+        }
+    }
+
+    return string::npos; // No matching left parenthesis found
 }

lab1/hello.cc

@@ -0,0 +1,5 @@
+#include <iostream>
+
+int main(int argc, char *argv[]) {
+    std::cout << "Hello" << std::endl;
+}