diff --git a/task1.cpp b/task1.cpp
new file mode 100644
index 0000000..f231955
--- /dev/null
+++ b/task1.cpp
@@ -0,0 +1,21 @@
+#include <iostream>
+#define SIZE 80
+using namespace std;
+
+int main()
+{
+    char str[SIZE];
+    cout << "Input string: ";
+    cin.getline(str, SIZE);
+
+    int i = 0;
+    while (str[i] != '\0') {
+        if (str[i] == ' ') {
+            str[i] = '\t';
+        }
+        ++i;
+    }
+
+    cout << "Modified string: " << str << endl;
+    system("pause");
+}
\ No newline at end of file