View Compilation Error

0_0_17520437_2839.cpp: In function 'int main()':
0_0_17520437_2839.cpp:5:13: error: expected primary-expression before '%' token
 while(scanf(%d%d,&a,&b)!=EOF)
             ^
0_0_17520437_2839.cpp:5:14: error: 'd' was not declared in this scope
 while(scanf(%d%d,&a,&b)!=EOF)
              ^