foo.c: In function 'main':
foo.c:15:2: warning: parameter names (without types) in function declaration
  void Insert(a,n,x);
  ^~~~
foo.c:24:2: warning: parameter names (without types) in function declaration
  void Insert(a, n,x);
  ^~~~
foo.c:30:11: warning: implicit declaration of function 'InsertAt'; did you mean 'Insert'? [-Wimplicit-function-declaration]
    return InsertAt(a, n,k, x);
           ^~~~~~~~
           Insert
foo.c:5:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ^~~~~~~~~~~~~~~
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &x);
  ^~~~~~~~~~~~~~~
foo.c:9:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ^~~~~~~~~~~~~~~~~~
/tmp/ccMmc28X.o: In function `main':
foo.c:(.text.startup+0xce): undefined reference to `InsertAt'
collect2: error: ld returned 1 exit status

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