View Compilation Error

0_0_19112616_5442.cpp: In function 'int main()':
0_0_19112616_5442.cpp:13:5: error: 'cin' was not declared in this scope
     cin>>t;
     ^
0_0_19112616_5442.cpp:33:22: error: lvalue required as left operand of assignment
         scanf("%d",&n=t);
                      ^