/in/foo.cc: In function 'void re(int&)':
/in/foo.cc:5:2: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
  while(ch=getchar(),ch<33);x=ch-48;
  ^~~~~
/in/foo.cc:5:28: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
  while(ch=getchar(),ch<33);x=ch-48;
                            ^
/in/foo.cc: At global scope:
/in/foo.cc:22:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^