foo.c: In function 'way1':
foo.c:23:10: error: expected expression before ';' token
   count+=;
          ^
foo.c: In function 'way2':
foo.c:41:2: error: expected ',' or ';' before 'for'
  for(i=1;i<=x2;i++)
  ^~~
foo.c:41:11: warning: statement with no effect [-Wunused-value]
  for(i=1;i<=x2;i++)
          ~^~~~
foo.c:41:19: error: expected ';' before ')' token
  for(i=1;i<=x2;i++)
                   ^
foo.c:41:19: error: expected statement before ')' token
foo.c:44:4: error: break statement not within loop or switch
    break;
    ^~~~~
foo.c: In function 'main':
foo.c:11:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ^~~~~~~~~~~~~~

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