foo.c: In function 'main':
foo.c:6:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'x'
    6 |                 x=1
      |                 ^
foo.c:6:17: error: 'x' undeclared (first use in this function)
foo.c:6:17: note: each undeclared identifier is reported only once for each function it appears in
foo.c:6:20: error: expected ';' before 'printf'
    6 |                 x=1
      |                    ^
      |                    ;
    7 | 
    8 |     printf("%d"，x);
      |     ~~~~~~          

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