foo.cc: In function 'int main()':
foo.cc:7:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(n>=3||n>=4)
  ^~
foo.cc:9:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   m2=n/4;
   ^~
foo.cc:16:3: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   else 
   ^~~~
foo.cc:18:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
    m2=(n/4)/4;
    ^~
foo.cc:10:7: warning: 'm1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   i=m1+m2+n;
     ~~^~~