📝 Added sandbox (code sketchbook)

sandbox/open2.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    FILE * fptr;
+    char c;
+
+    // Open file
+    fptr = fopen("file.txt", "r");
+    if (fptr == NULL) {
+        printf("Cannot open file \n");
+        exit(0);
+    }
+
+    // Read contents form file
+    c = fgetc(fptr);
+    while (c != EOF) {
+        printf("%c", c);
+        c = fgetc(fptr);
+    }
+
+    fclose(fptr);
+    return 0;
+}