/in/foo.cc: In function 'int main()':
/in/foo.cc:5:9: warning: 'a' is used uninitialized [-Wuninitialized]
    5 | cout<<a+b;
      |         ^
/in/foo.cc:4:5: note: 'a' was declared here
    4 | int a,b;
      |     ^
/in/foo.cc:5:9: warning: 'b' is used uninitialized [-Wuninitialized]
    5 | cout<<a+b;
      |         ^
/in/foo.cc:4:7: note: 'b' was declared here
    4 | int a,b;
      |       ^