update folders

snipplets/code/C/clear_string.c

@@ -0,0 +1,10 @@
+int main(int argc, char const *argv[])
+{
+    char *buffer = malloc(256 + 1);
+
+    buffer[0] = '\0';
+    strcpy(buffer, "");
+    memset(buffer, '\0', sizeof(buffer));
+
+    return 0;
+}