View Compilation Error

0_0_18667920_19258.cpp: In function 'int main()':
0_0_18667920_19258.cpp:5:26: error: expected primary-expression before '%' token
     while(~scanf("%d %d",%a,%b)&&a!=0&&b!=0)
                          ^
0_0_18667920_19258.cpp:5:29: error: expected primary-expression before '%' token
     while(~scanf("%d %d",%a,%b)&&a!=0&&b!=0)
                             ^