foo.cc:11:23: warning: multi-character character constant [-Wmultichar]
   if(c[i]==' '||c[i]=='/n'||c[i]>=65&&c[i]<=90) continue;
                       ^~~~
foo.cc: In function 'int main()':
foo.cc:8:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<=s.size()-1;i++)
              ~^~~~~~~~~~~~
foo.cc:11:37: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if(c[i]==' '||c[i]=='/n'||c[i]>=65&&c[i]<=90) continue;
                             ~~~~~~~~^~~~~~~~~~

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