/in/foo.cc: In function 'int main()':
/in/foo.cc:12:26: warning: 'm' is used uninitialized [-Wuninitialized]
   12 |                         m++;
      |                         ~^~
/in/foo.cc:5:17: note: 'm' was declared here
    5 |         int i,k,m;
      |                 ^