View Compilation Error

0_0_39746781_31096.cpp: In function 'int main()':
0_0_39746781_31096.cpp:6:33: error: expected ')' before 'while'
    6 | scanf("%c%c%c", &ch1, &ch2, &ch3
      |      ~                          ^
      |                                 )
    7 |     while (scanf(1) {
      |     ~~~~~