View Compilation Error

0_0_38606676_7852.cpp: In function 'int main()':
0_0_38606676_7852.cpp:54:17: error: 'debug' was not declared in this scope
                 debug(que[i]);
                 ^~~~~
0_0_38606676_7852.cpp:54:17: note: suggested alternative: 'setbuf'
                 debug(que[i]);
                 ^~~~~
                 setbuf