foo.c: In function 'Fib':
foo.c:8:18: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int a=1,b=1,i=3,c;
                  ^
foo.c: In function 'main':
foo.c:23:4: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
   s=s+Fib(k1);
   ~^~~~~~~~~~

自豪的采用jd5进行评测(github.com/masnn/jd5)