foo.cc: In function ‘int main()’:
foo.cc:7:19: warning: ‘n’ is used uninitialized [-Wuninitialized]
    7 |         if(a/m > b/n)
      |                  ~^~
foo.cc:5:19: note: ‘n’ was declared here
    5 |         int a,m,b,n;
      |                   ^