foo.c: In function 'main':
foo.c:5:22: warning: unused variable 'i' [-Wunused-variable]
    5 |         int a, b, c, i; char e;
      |                      ^
foo.c:5:19: warning: unused variable 'c' [-Wunused-variable]
    5 |         int a, b, c, i; char e;
      |                   ^

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