progress

programs/a4/info.json

@@ -0,0 +1,10 @@
+{
+  "language": "C",
+  "name": "課題4",
+  "description": "1年の月の日数を返すプログラム。",
+  "output": {
+    "type": "screenshot",
+    "content": "./assets/a4.png"
+  },
+  "note": ""
+}

programs/a4/main.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+
+int main(void) {
+    int month;
+
+    printf("Input month: ");
+    scanf("%d", &month);
+
+    if (month < 1 || month > 12) {
+        puts("Unknown month");
+        return 1;
+    }
+
+    switch (month) {
+        case 2:
+            puts("28 days");
+            break;
+        case 4:
+        case 6:
+        case 9:
+        case 11:
+            puts("30 days");
+            break;
+        default:
+            puts("31 days");
+    }
+
+    return 0;
+}