foo.cc: In function 'int Count(int*, int, int)':
foo.cc:4:18: error: 'n' was not declared in this scope
    4 |  for(int j=i+1;j<n;j++)
      |                  ^
foo.cc:5:18: error: 'm' was not declared in this scope
    5 |    if(x[i]+x[j]==m)
      |                  ^
foo.cc: In function 'int main()':
foo.cc:13:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |  scanf("%d %d",&n,&m);
      |  ~~~~~^~~~~~~~~~~~~~~
foo.cc:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |   scanf("%d",&x[i]);
      |   ~~~~~^~~~~~~~~~~~

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