B27

include/task1.h

@@ -0,0 +1 @@
+int ageCheck(int age);

src/main1.cpp

@@ -0,0 +1,15 @@
+#include "task1.h"
+#include <stdio.h>
+
+int main()
+{
+    int age = 0;
+    printf("How old are you?\n");
+    scanf("%d", &age);
+    int result = ageCheck(age);
+    if (result == 1)
+        printf("Access granted!\n");
+    else
+        printf("Access denied!\n");
+    return 0;
+}

src/task1.cpp

@@ -0,0 +1,9 @@
+#include "task1.h"
+
+int ageCheck(int age)
+{
+    if (age >= 18)
+        return 1;
+    else
+        return 0;
+}