/in/foo.c: In function 'main':
/in/foo.c:17:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'float *' [-Wformat=]
  scanf("%d%d",&a,&b);
          ^
/in/foo.c:17:12: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'float *' [-Wformat=]
  scanf("%d%d",&a,&b);
            ^
/in/foo.c: In function 'fib':
/in/foo.c:12:9: warning: 'a3' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return a3;
         ^~
/in/foo.c: In function 'main':
/in/foo.c:12:9: warning: 'a3' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return a3;
         ^~
/in/foo.c:4:16: note: 'a3' was declared here
  int a1=1,a2=1,a3,count=0;
                ^~
/in/foo.c:12:9: warning: 'a3' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return a3;
         ^~
/in/foo.c:4:16: note: 'a3' was declared here
  int a1=1,a2=1,a3,count=0;
                ^~