View Compilation Error

0_0_20529619_13437.cpp: In function 'int main()':
0_0_20529619_13437.cpp:5:26: error: expected ')' before '!' token
 while(scanf("%d%d",&a,&b)!EOF)
                          ^
0_0_20529619_13437.cpp:5:30: error: expected ';' before ')' token
 while(scanf("%d%d",&a,&b)!EOF)
                              ^