View Compilation Error

0_0_39070752_6120.cpp: In function 'int main()':
0_0_39070752_6120.cpp:7:43: error: expected ')' before ';' token
    7 |         while(EOF!=scanf("%lld%lld",&a,&b);)
      |              ~                            ^
      |                                           )
0_0_39070752_6120.cpp:7:44: error: expected primary-expression before ')' token
    7 |         while(EOF!=scanf("%lld%lld",&a,&b);)
      |                                            ^