View Compilation Error

0_0_29101426_32634.cpp: In function 'int main()':
0_0_29101426_32634.cpp:11:3: error: expected ';' before 'int'
   int n;
   ^
0_0_29101426_32634.cpp:12:8: error: 'n' was not declared in this scope
   cin>>n;
        ^
0_0_29101426_32634.cpp:25:5: error: 'ans' was not declared in this scope
     ans=ans+x-1;//遍历每一组情况下应该对x减一才能得到正确的交换次数 
     ^
0_0_29101426_32634.cpp:27:9: error: 'ans' was not declared in this scope
   cout<<ans<<endl;
         ^