View Compilation Error

0_0_24875319_30518.cpp: In function 'int main()':
0_0_24875319_30518.cpp:19:31: error: 'aif' was not declared in this scope
        else aif(fabs(b-c) == 1)
                               ^
0_0_24875319_30518.cpp:21:9: error: 'else' without a previous 'if'
         else
         ^