/in/foo.cc: In function 'int f(int)':
/in/foo.cc:7:21: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized]
    7 |         int a=1,b=1,c;
      |                     ^
/in/foo.cc: In function 'void sum(int, int)':
/in/foo.cc:22:20: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized]
   22 |                 sum=sum+f(i);
      |                 ~~~^~~~~~~~~
/in/foo.cc:7:21: note: 'c' was declared here
    7 |         int a=1,b=1,c;
      |                     ^