foo.c:2:10: error: expected ')' before '!=' token
    2 | int ccc(x!=y)
      |          ^~
      |          )
foo.c: In function 'main':
foo.c:17:3: warning: implicit declaration of function 'ccc' [-Wimplicit-function-declaration]
   17 | s=ccc(a[1],a[2]);
      |   ^~~
foo.c:13:10: warning: unused variable 'k' [-Wunused-variable]
   13 |  int j,m,k,a[100],s;
      |          ^
foo.c:14:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   14 |   scanf("%d",&m);
      |   ^~~~~~~~~~~~~~
foo.c:16:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   16 |   scanf("%d",&a[j]);
      |   ^~~~~~~~~~~~~~~~~

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