View Compilation Error

0_0_39333161_23708.cpp: In function 'void solve()':
0_0_39333161_23708.cpp:69:26: error: expected ')' before ';' token
   69 |     while(scanf("%s", op);)
      |          ~               ^
      |                          )
0_0_39333161_23708.cpp:69:27: error: expected primary-expression before ')' token
   69 |     while(scanf("%s", op);)
      |                           ^