/in/foo.c: In function 'main':
/in/foo.c:8:3: warning: implicit declaration of function 'scanf_s' [-Wimplicit-function-declaration]
   scanf_s("%s",str[i],1000);
   ^~~~~~~
/tmp/ccOPedaX.o: In function `main':
foo.c:(.text.startup+0x3a): undefined reference to `scanf_s'
foo.c:(.text.startup+0x5b): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status