foo.c: In function ‘main’:
foo.c:7:30: error: invalid operands to binary & (have ‘int *’ and ‘int’)
    7 |         scanf("%d %d %d", &a &b &c);
      |                           ~~ ^
      |                           |
      |                           int *
foo.c:21:17: error: ‘renturn’ undeclared (first use in this function)
   21 |                 renturn 0;
      |                 ^~~~~~~
foo.c:21:17: note: each undeclared identifier is reported only once for each function it appears in
foo.c:21:24: error: expected ‘;’ before numeric constant
   21 |                 renturn 0;
      |                        ^~
      |                        ;
foo.c:22:1: error: expected declaration or statement at end of input
   22 | }
      | ^