draft

programs/p41/info.json

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+{
+  "language": "C",
+  "name": "課題1",
+  "description": "教科書の演習4ー1の解答",
+  "output": {
+    "type": "screenshot",
+    "content": "./assets/p41.png"
+  },
+  "note": ""
+}

programs/p41/main.c

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+#include <stdio.h>
+
+int main(void) {
+    int n;
+    int retry = 1;
+
+    do {
+        printf("Input integer: ");
+        scanf("%d", &n);
+
+        if (n > 0) {
+	        printf("%d is positive.\n", n);
+        } else if (n < 0) {
+            printf("%d is negative.\n", n);
+        } else {
+            printf("It is zero.\n");
+        }
+
+        printf("Retry? [1/0]: ");
+        scanf("%d", &retry);
+    } while (retry == 1);
+
+    return 0;
+}