/in/foo.c: In function 'main':
/in/foo.c:6:6: warning: unused variable 'i' [-Wunused-variable]
  int i,l;
      ^
/in/foo.c: In function 'plus':
/in/foo.c:22:7: warning: unused variable 'j' [-Wunused-variable]
 int i,j,k,al,bl,t;
       ^