View Compilation Error

0_0_25523279_28559.cpp: In function 'int main()':
0_0_25523279_28559.cpp:9:3: error: 'sum' was not declared in this scope
   sum=0;
   ^
0_0_25523279_28559.cpp:10:7: error: 'i' was not declared in this scope
   for(i=1;i*i<=n;i++) 
       ^
0_0_25523279_28559.cpp:21:1: error: expected ';' before '}' token
 }
 ^