/in/foo.c: In function 'main':
/in/foo.c:11:8: warning: implicit declaration of function 'scanf_s' [-Wimplicit-function-declaration]
  int n;scanf_s("%d",&n);
        ^~~~~~~
/in/foo.c: In function 'Moveright':
/in/foo.c:8:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/tmp/ccCmIRXh.o: In function `main':
foo.c:(.text.startup+0x2a): undefined reference to `scanf_s'
foo.c:(.text.startup+0x59): undefined reference to `scanf_s'
foo.c:(.text.startup+0x79): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status