View Compilation Error

0_0_22445222_13301.cpp: In function 'int main()':
0_0_22445222_13301.cpp:5:23: error: expected primary-expression before '%' token
   while (scanf("%d%d",%a,%b)!=EOF
                       ^
0_0_22445222_13301.cpp:5:26: error: expected primary-expression before '%' token
   while (scanf("%d%d",%a,%b)!=EOF
                          ^
0_0_22445222_13301.cpp:6:3: error: expected ')' before 'printf'
   printf("%d\n",a + b);
   ^