Main.c: In function ‘main’:
Main.c:14:9: warning: implicit declaration of function ‘scnaf’; did you mean ‘scanf’? [-Wimplicit-function-declaration]
   14 |         scnaf("%d",&n);
      |         ^~~~~
      |         scanf
/usr/bin/ld: /tmp/ccxpbG22.o: in function `main':
Main.c:(.text.startup+0x7b): undefined reference to `scnaf'
collect2: error: ld returned 1 exit status