View Compilation Error

0_0_19418657_28775.cpp: In function 'int main()':
0_0_19418657_28775.cpp:6:31: error: expected ')' before 'a'
     while(~scanf("%d%d",&a,&b)a||b){
                               ^
0_0_19418657_28775.cpp:6:35: error: expected ';' before ')' token
     while(~scanf("%d%d",&a,&b)a||b){
                                   ^
0_0_19418657_28775.cpp:16:1: error: expected '}' at end of input
 }
 ^