View Compilation Error

0_0_20871619_24956.cpp: In function 'int main()':
0_0_20871619_24956.cpp:5:23: error: expected unqualified-id before '&' token
 while(scanf("%d%d",&a.&b)
                       ^
0_0_20871619_24956.cpp:6:1: error: expected ')' before '{' token
 {
 ^