foo.cpp: In function 'int mian()':
foo.cpp:29:13: warning: unused variable 'machine' [-Wunused-variable]
         int machine=way[which][step];
             ^
foo.cpp:43:21: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int*' [-Wformat=]
     printf("%d",&ans);
                     ^
c:/tdm-gcc-32/bin/../lib/gcc/mingw32/4.8.1/../../../libmingw32.a(main.o):main.c:(.text.startup+0xa7): undefined reference to `WinMain@16'
collect2.exe: error: ld returned 1 exit status