foo.c: In function 'main':
foo.c:7:12: warning: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
     result=scanf_s("%d%d%d",&a,&b,&c);
            ^~~~~~~
            scanf
foo.c:6:6: warning: variable 'result' set but not used [-Wunused-but-set-variable]
  int result;
      ^~~~~~
/tmp/ccIXRghn.o: In function `main':
foo.c:(.text.startup+0x43): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status

[Hydro](https://hydro.ac)提供评测服务