View Compilation Error

0_0_20643436_23510.cpp:2:11: error: '::main' must return 'int'
 void main()
           ^
0_0_20643436_23510.cpp: In function 'int main()':
0_0_20643436_23510.cpp:18:7: error: 'i' was not declared in this scope
   for(i=0;i<n;i++)
       ^
0_0_20643436_23510.cpp:23:7: error: 'i' was not declared in this scope
   for(i=0;i<n;i++)
       ^