foo.cc: In function 'int main()':
foo.cc:34:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(int i=0;i<m;i++)
  ^~~
foo.cc:37:4: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
    for(int i=0;i<m;i++)
    ^~~
foo.cc:39:11: warning: 'char* gets(char*)' is deprecated [-Wdeprecated-declarations]
     gets(s);
           ^
In file included from /usr/include/stdio.h:862:0,
                 from /usr/include/c++/7/cstdio:42,
                 from /usr/include/c++/7/ext/string_conversions.h:43,
                 from /usr/include/c++/7/bits/basic_string.h:6361,
                 from /usr/include/c++/7/string:52,
                 from /usr/include/c++/7/bits/locale_classes.h:40,
                 from /usr/include/c++/7/bits/ios_base.h:41,
                 from /usr/include/c++/7/ios:42,
                 from /usr/include/c++/7/ostream:38,
                 from /usr/include/c++/7/iostream:39,
                 from foo.cc:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:232:1: note: declared here
 gets (char *__str)
 ^~~~
foo.cc:32:14: warning: unused variable 'ch' [-Wunused-variable]
  char s[100],ch;
              ^~
foo.cc:39:9: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result [-Wunused-result]
     gets(s);
     ~~~~^~~
/tmp/ccVxaRSC.o: In function `main':
foo.cc:(.text.startup+0xc1): warning: the `gets' function is dangerous and should not be used.

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