View Compilation Error

0_0_19781358_7782.cpp: In function 'int main()':
0_0_19781358_7782.cpp:7:19: error: 'scanf' was not declared in this scope
      scanf("%d",&n);
                   ^
0_0_19781358_7782.cpp:8:14: error: 'getchar' was not declared in this scope
      getchar();
              ^
0_0_19781358_7782.cpp:23:38: error: 'printf' was not declared in this scope
                      printf("%c",s[i]);
                                      ^
0_0_19781358_7782.cpp:27:50: error: 'printf' was not declared in this scope
                          printf("%d%c",count,s[i]);
                                                  ^
0_0_19781358_7782.cpp:39:25: error: 'printf' was not declared in this scope
              printf("\n");
                         ^