View Compilation Error

0_0_19923720_15368.cpp:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include　＜iostream＞
         ^
0_0_19923720_15368.cpp: In function 'int main()':
0_0_19923720_15368.cpp:6:1: error: 'cout' was not declared in this scope
 cout<<t;
 ^
0_0_19923720_15368.cpp:9:2: error: 'cin' was not declared in this scope
  cin>>n;
  ^
0_0_19923720_15368.cpp:10:18: error: 'endl' was not declared in this scope
 cout<<2*n*n-n+1<<endl;
                  ^