/in/foo.c: In function 'main':
/in/foo.c:13:5: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
   y=sqrt(5*x+10);
     ^~~~
/in/foo.c:13:5: warning: incompatible implicit declaration of built-in function 'sqrt'
/in/foo.c:13:5: note: include '<math.h>' or provide a declaration of 'sqrt'
/in/foo.c:16:2: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
  printf("%.3f",y);
  ^~~~~~~~~~~~~~~~

VJ4Error('ProblemDataNotFoundError', '题目 1004 的数据未找到。', 'MJ_C', 1004)