View Compilation Error

0_0_13290084_3029.cpp: In function 'int main()':
0_0_13290084_3029.cpp:7:23: error: expected ')' before ';' token
   while ( cin>> a >> b;){
                       ^
0_0_13290084_3029.cpp:7:24: error: expected primary-expression before ')' token
   while ( cin>> a >> b;){
                        ^