View Compilation Error

0_0_38094425_23126.cpp: In function 'int main()':
0_0_38094425_23126.cpp:10:11: error: 'x' was not declared in this scope
      cin>>x;
           ^
0_0_38094425_23126.cpp:11:9: error: 'x' was not declared in this scope
      s+=x;
         ^