foo.c: In function 'main':
foo.c:6:4: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'scanf'
    6 |    scanf("%d",z);
      |    ^~~~~
foo.c:9:16: warning: right-hand operand of comma expression has no effect [-Wunused-value]
    9 |         for(i=1,i>=1,i++)
      |                ^
foo.c:9:25: error: expected ';' before ')' token
    9 |         for(i=1,i>=1,i++)
      |                         ^
      |                         ;
foo.c:9:25: error: expected expression before ')' token
foo.c:17:25: error: 'k' undeclared (first use in this function)
   17 |                         k=x%3;
      |                         ^
foo.c:17:25: note: each undeclared identifier is reported only once for each function it appears in
foo.c:28:17: error: expected ';' before '}' token
   28 |         return 0
      |                 ^
      |                 ;
   29 | 
   30 | }
      | ~                

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