View Compilation Error

0_0_14834646_13885.cpp: In function 'int main()':
0_0_14834646_13885.cpp:4:16: error: 'a' was not declared in this scope
     while(cin>>a&&cin>>b){
                ^
0_0_14834646_13885.cpp:4:24: error: 'b' was not declared in this scope
     while(cin>>a&&cin>>b){
                        ^