View Compilation Error

0_0_27173576_8700.cpp: In function 'int main()':
0_0_27173576_8700.cpp:9:35: error: 'scanf' was not declared in this scope
     while(scanf("%d%s%s",&n,in,out)!=EOF)
                                   ^
0_0_27173576_8700.cpp:9:38: error: 'EOF' was not declared in this scope
     while(scanf("%d%s%s",&n,in,out)!=EOF)
                                      ^
0_0_27173576_8700.cpp:37:28: error: 'printf' was not declared in this scope
             printf("Yes.\n");
                            ^
0_0_27173576_8700.cpp:48:35: error: 'printf' was not declared in this scope
             printf("No.\nFINISH\n");
                                   ^