/in/foo.cc: In function 'int main()':
/in/foo.cc:5:8: warning: unused variable 'm' [-Wunused-variable]
    5 |  int g,m,n;
      |        ^
/in/foo.cc:11:20: warning: 'n' may be used uninitialized [-Wmaybe-uninitialized]
   11 |                 g=g*n;
      |                   ~^~
/in/foo.cc:5:10: note: 'n' was declared here
    5 |  int g,m,n;
      |          ^