/in/foo.cc: In function 'int main()':
/in/foo.cc:7:21: warning: 'n' is used uninitialized [-Wuninitialized]
    7 |         cout<<n/(a+b);
      |                     ^
/in/foo.cc:5:13: note: 'n' was declared here
    5 |         int n,a,b;
      |             ^