View Compilation Error

0_0_26792207_22373.cpp: In function 'int main()':
0_0_26792207_22373.cpp:5:33: error: expected ')' before ';' token
     while(~scanf("%ld%ld",&a,&b);)
                                 ^
0_0_26792207_22373.cpp:5:34: error: expected primary-expression before ')' token
     while(~scanf("%ld%ld",&a,&b);)
                                  ^