View Compilation Error

0_0_36444047_18190.cpp: In function 'int main()':
0_0_36444047_18190.cpp:44:11: error: 'i' was not declared in this scope
     forab(i, 1, n)
           ^
0_0_36444047_18190.cpp:44:18: error: 'forab' was not declared in this scope
     forab(i, 1, n)
                  ^
0_0_36444047_18190.cpp:46:14: error: 'forn' was not declared in this scope
     forn(i, n)
              ^