foo.cc: In function ‘int main()’:
foo.cc:11:21: warning: ‘m’ may be used uninitialized [-Wmaybe-uninitialized]
   11 |                 int m=t%m;
      |                     ^
foo.cc:11:21: note: ‘m’ was declared here
   11 |                 int m=t%m;
      |                     ^