View Compilation Error

0_0_38523158_12026.cpp: In function 'double divide(int, int)':
0_0_38523158_12026.cpp:43:30: error: 'devide' was not declared in this scope
     double d1=devide(left,mid);
                              ^
0_0_38523158_12026.cpp: In function 'int main()':
0_0_38523158_12026.cpp:69:24: error: 'scanf_s' was not declared in this scope
   while(scanf_s("%d",&N) && N!=0)
                        ^