diff --git a/20-12-23 /dane.txt b/20-12-23 /dane.txt
new file mode 100644
index 0000000..4edeb65
--- /dev/null
+++ b/20-12-23 /dane.txt	
@@ -0,0 +1,3 @@
+lkdfjiosadfa
+fjkafijdaof
+fjasifhusai
\ No newline at end of file
diff --git a/20-12-23 /ex.1.cpp b/20-12-23 /ex.1.cpp
new file mode 100644
index 0000000..37c7257
--- /dev/null
+++ b/20-12-23 /ex.1.cpp	
@@ -0,0 +1,20 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+
+using namespace std;
+
+int main() {
+    fstream file("./dane.txt", ios::in | ios::out | ios::app);
+    if (!file.is_open()) {
+        cout << "Nie udalo sie otworzyc pliku" << endl;
+        return 1;
+    }
+
+    string line;
+    while (getline(file, line)) {
+        cout << line << endl;
+    }
+
+    file.close();
+}
\ No newline at end of file
diff --git a/20-12-23 /ex.2.cpp b/20-12-23 /ex.2.cpp
new file mode 100644
index 0000000..f05755f
--- /dev/null
+++ b/20-12-23 /ex.2.cpp	
@@ -0,0 +1,27 @@
+#include <iostream>
+#include <string>
+#include <fstream>
+#include <vector>
+
+using namespace std;
+
+int main() {
+    fstream file("imona_nazwisko.txt", ios::in | ios::out | ios::app);
+    if (!file.is_open()) {
+        cout << "Błąd otwarcia pliku" << endl;
+        return 1;
+    }
+
+    vector<string> first_names;
+    vector<string> last_names;
+    string firstName, last_name;
+
+    while (file >> firstName >> last_name) {
+        first_names.push_back(firstName);
+        last_names.push_back(last_name);
+    }
+
+    for (int i = 0; i < first_names.size(); i++) {
+        cout << first_names[i] << " " << last_names[i] << endl;
+    }
+}
\ No newline at end of file
diff --git a/20-12-23 /ex.3.cpp b/20-12-23 /ex.3.cpp
new file mode 100644
index 0000000..ebe42b4
--- /dev/null
+++ b/20-12-23 /ex.3.cpp	
@@ -0,0 +1,35 @@
+#include <iostream>
+#include <string>
+#include <fstream>
+#include <vector>
+
+using namespace std;
+
+int main() {
+    fstream file("imona_nazwisko.txt", ios::in | ios::out | ios::app);
+    if (!file.is_open()) {
+        cout << "Błąd otwarcia pliku" << endl;
+        return 1;
+    }
+
+    vector<string> first_names;
+    vector<string> last_names;
+    vector<string> grades;
+    string firstName, last_name, grade;
+
+    while (file >> firstName >> last_name >> grade) {
+        first_names.push_back(firstName);
+        last_names.push_back(last_name);
+        grades.push_back(grade);
+    }
+
+    float sum = 0;
+    for (int i = 0; i < first_names.size(); i++) {
+        cout << first_names[i] << " " << last_names[i] << " " << grades[i] << endl;
+        sum += stof(grades[i]);
+    }
+    cout << "Średnia: " << sum / grades.size() << endl;
+
+    file.close();
+    return 0;
+}
\ No newline at end of file
diff --git a/20-12-23 /imona_nazwisko.txt b/20-12-23 /imona_nazwisko.txt
new file mode 100644
index 0000000..e8154b4
--- /dev/null
+++ b/20-12-23 /imona_nazwisko.txt	
@@ -0,0 +1,4 @@
+Anna Nowak
+Jan Kowalski
+Maria Wiśniewska
+Piotr Kwiatkowski
\ No newline at end of file