View Compilation Error

0_0_21760765_13052.cpp: In function 'int main()':
0_0_21760765_13052.cpp:14:2: error: a function-definition is not allowed here before '{' token
  { if(a.mm!=b.mm)
  ^
0_0_21760765_13052.cpp:28:25: error: 'cmp' was not declared in this scope
    sort(player,player+n,cmp);
                         ^