View Compilation Error

0_0_17253639_17065.cpp: In function 'int main()':
0_0_17253639_17065.cpp:5:20: error: expected primary-expression before '%' token
 while(scanf("%d%d",%a,%b)!=EOF)
                    ^
0_0_17253639_17065.cpp:5:23: error: expected primary-expression before '%' token
 while(scanf("%d%d",%a,%b)!=EOF)
                       ^