View Compilation Error

0_0_13721219_10791.cpp:9:1: error: stray '\' in program
 int n=0;/\number of question
 ^
0_0_13721219_10791.cpp:9:9: error: expected unqualified-id before '/' token
 int n=0;/\number of question
         ^
0_0_13721219_10791.cpp: In function 'int main()':
0_0_13721219_10791.cpp:24:13: error: 'bp' was not declared in this scope
             bp=mon[i]/ex[i+1];// 2^i/ex[i+1] is the boundary probability ==>  bp * ex[i+1] > 2^i
             ^