View Compilation Error

0_0_13466221_29687.cpp: In function 'int main()':
0_0_13466221_29687.cpp:20:3: error: 'queue' was not declared in this scope
   queue<int> numqueue;
   ^
0_0_13466221_29687.cpp:20:9: error: expected primary-expression before 'int'
   queue<int> numqueue;
         ^
0_0_13466221_29687.cpp:21:9: error: expected primary-expression before 'char'
   queue<char> charqueue;
         ^