foo.cc: In function 'bool xry(int)':
foo.cc:19:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=2;i<=k;i++)
  ^~~
foo.cc:21:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   if(i>k) return 1;
   ^~
foo.cc: In function 'void god(int)':
foo.cc:35:25: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<n<<"="<<a<<"+"<<b<<endl;
                         ^
foo.cc:35:20: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<n<<"="<<a<<"+"<<b<<endl;
                    ^~~

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