View Compilation Error

0_0_18780328_27991.cpp: In function 'int main()':
0_0_18780328_27991.cpp:5:26: error: expected ')' before ';' token
 while(scanf("%d%d",&a,&b);)
                          ^
0_0_18780328_27991.cpp:5:27: error: expected primary-expression before ')' token
 while(scanf("%d%d",&a,&b);)
                           ^