some programs!

cs101/dh_20260923_02_draw_rectangles.cpp

@@ -0,0 +1,47 @@
+#include <iostream>
+
+void print_filled_rectangle(int h, int w, char c) {
+    for (int i = 0; i < h; i++) {
+        for (int j = 0; j < w; j++) {
+            std::cout << c;
+        }
+        std::cout << std::endl;
+    }
+}
+
+void print_unfilled_rectangle(int h, int w, char c) {
+    for (int i = 0; i < w; i++) {
+        std::cout << c;
+    }
+    std::cout << std::endl;
+    for (int i = 0; i < h - 2; i++) {
+        std::cout << c;
+        for (int j = 0; j < w - 2; j++) {
+            std::cout << " ";
+        }
+        std::cout << c << std::endl;
+    }
+    for (int i = 0; i < w; i++) {
+        std::cout << c;
+    }
+    std::cout << std::endl;
+}
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    int h, w;
+    char c;
+    bool filled;
+
+    while (std::cin >> h >> w >> c >> filled) {
+        if (filled) {
+            print_filled_rectangle(h, w, c);
+        } else {
+            print_unfilled_rectangle(h, w, c);
+        }
+    }
+
+    return 0;
+}