View Compilation Error

0_0_20814588_10268.cpp: In function 'int main()':
0_0_20814588_10268.cpp:23:9: error: 'temp' was not declared in this scope
   first=temp;
         ^
0_0_20814588_10268.cpp:29:3: error: 'temp' was not declared in this scope
   temp=i+2;  
   ^