View Compilation Error

0_0_38820021_11326.cpp: In function 'int main()':
0_0_38820021_11326.cpp:7:26: error: 'amp' was not declared in this scope
    7 |         while (gets(ch) && ch[0] != '0')
      |                          ^~~
0_0_38820021_11326.cpp:7:29: error: expected ')' before ';' token
    7 |         while (gets(ch) && ch[0] != '0')
      |               ~             ^
      |                             )
0_0_38820021_11326.cpp:7:31: error: 'amp' was not declared in this scope
    7 |         while (gets(ch) && ch[0] != '0')
      |                               ^~~
0_0_38820021_11326.cpp:7:48: error: expected ';' before ')' token
    7 |         while (gets(ch) && ch[0] != '0')
      |                                                ^
      |                                                ;