View Compilation Error

0_0_33250967_8054.cpp: In function 'int main()':
0_0_33250967_8054.cpp:9:6: error: 'sum' was not declared in this scope
      sum=0;
      ^
0_0_33250967_8054.cpp:11:12: error: 's' was not declared in this scope
       cin>>s;
            ^