View Compilation Error

0_0_36681806_23248.cpp:13:5: error: redefinition of 'int last'
 int last,front;
     ^
0_0_36681806_23248.cpp:7:5: note: 'int last' previously declared here
 int last,front;
     ^
0_0_36681806_23248.cpp:13:10: error: redefinition of 'int front'
 int last,front;
          ^
0_0_36681806_23248.cpp:7:10: note: 'int front' previously declared here
 int last,front;
          ^
0_0_36681806_23248.cpp: In function 'int main()':
0_0_36681806_23248.cpp:18:14: error: 'T' was not declared in this scope
  scanf("%d",&T);
              ^