View Compilation Error

0_0_15696547_22199.cpp: In function 'int main()':
0_0_15696547_22199.cpp:5:17: error: expected ')' before string constant
      while(scanf"%d %d",&a,&b)>0)
                 ^
0_0_15696547_22199.cpp:5:30: error: expected ';' before ')' token
      while(scanf"%d %d",&a,&b)>0)
                              ^