View Compilation Error

0_0_33860674_12659.cpp: In function 'int main()':
0_0_33860674_12659.cpp:17:4: error: expected '}' before 'else'
    else{
    ^
0_0_33860674_12659.cpp:20:5: error: 'kui' was not declared in this scope
   } kui+=g*a;
     ^
0_0_33860674_12659.cpp:20:10: error: 'g' was not declared in this scope
   } kui+=g*a;
          ^
0_0_33860674_12659.cpp:21:19: error: 'i' was not declared in this scope
   cout<<"case #"<<i+1<<":"<<kui;
                   ^
0_0_33860674_12659.cpp: At global scope:
0_0_33860674_12659.cpp:23:1: error: expected declaration before '}' token
 }
 ^