Main.c: In function ‘main’:
Main.c:7:3: warning: implicit declaration of function ‘scanf_s’; did you mean ‘scanf’? [-Wimplicit-function-declaration]
    7 |   scanf_s("%d %d", &a, &b);
      |   ^~~~~~~
      |   scanf
/usr/bin/ld: /tmp/ccztNC9N.o: in function `main':
Main.c:(.text.startup+0x2c): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status