View Compilation Error

0_0_22908616_21838.cpp: In function 'int main()':
0_0_22908616_21838.cpp:31:9: error: 'else' without a previous 'if'
         else sign++;
         ^
0_0_22908616_21838.cpp:31:14: error: 'sign' was not declared in this scope
         else sign++;
              ^