View Compilation Error

0_0_22173339_11886.cpp: In function 'int main()':
0_0_22173339_11886.cpp:42:22: error: 'scanf' was not declared in this scope
  while (~scanf("%s",s))
                      ^
0_0_22173339_11886.cpp:47:2: error: 'cout' was not declared in this scope
  cout<<f[l][0]<<endl;
  ^
0_0_22173339_11886.cpp:47:17: error: 'endl' was not declared in this scope
  cout<<f[l][0]<<endl;
                 ^