View Compilation Error

0_0_27617772_6186.cpp: In function 'int main()':
0_0_27617772_6186.cpp:6:5: error: 'cin' was not declared in this scope
     cin>>T;
     ^
0_0_27617772_6186.cpp:7:9: error: 't' was not declared in this scope
     rep(t,1,T){
         ^
0_0_27617772_6186.cpp:7:14: error: 'rep' was not declared in this scope
     rep(t,1,T){
              ^