View Compilation Error

0_0_26032481_3948.cpp: In function 'int main()':
0_0_26032481_3948.cpp:64:17: error: expected '}' before 'else'
                 else if(sum(x)-sum(x-1)>0)
                 ^
0_0_26032481_3948.cpp:64:29: error: 'x' was not declared in this scope
                 else if(sum(x)-sum(x-1)>0)
                             ^
0_0_26032481_3948.cpp:69:13: error: 'else' without a previous 'if'
             else
             ^
0_0_26032481_3948.cpp: At global scope:
0_0_26032481_3948.cpp:80:1: error: expected declaration before '}' token
 }
 ^