prog.c: In function ‘main’:
prog.c:9:2: warning: implicit declaration of function ‘gets_s’; did you mean ‘fgetpos’? [-Wimplicit-function-declaration]
gets_s(s);
^~~~~~
fgetpos
prog.c:13:3: warning: implicit declaration of function ‘printf_s’; did you mean ‘printf’? [-Wimplicit-function-declaration]
printf_s("%c", symb);
^~~~~~~~
printf
/usr/bin/ld: /home/3cSxUD/ccIOWRkz.o: in function `main':
prog.c:(.text.startup+0x25): undefined reference to `gets_s'
/usr/bin/ld: prog.c:(.text.startup+0x5a): undefined reference to `printf_s'
/usr/bin/ld: prog.c:(.text.startup+0xbd): undefined reference to `printf_s'
collect2: error: ld returned 1 exit status