/in/foo.c: In function 'main':
/in/foo.c:8:13: warning: format '%f' expects argument of type 'double', but argument 2 has type 'int' [-Wformat=]
  printf("%.6f",min);
             ^
/in/foo.c:6:4: warning: 'a' is used uninitialized in this function [-Wuninitialized]
  if(a<b){min=a;}
    ^
/in/foo.c:6:4: warning: 'b' is used uninitialized in this function [-Wuninitialized]