View Compilation Error

0_0_18778966_6036.cpp: In function 'int main()':
0_0_18778966_6036.cpp:18:7: error: 'n' was not declared in this scope
 if(i= n-1)
       ^
0_0_18778966_6036.cpp:19:8: error: invalid operands of types 'int(const char*, ...)' and 'int' to binary 'operator%'
 printf%2
        ^
0_0_18778966_6036.cpp:19:8: error: expected '}' at end of input
0_0_18778966_6036.cpp:19:8: error: expected '}' at end of input