View Compilation Error

0_0_34317574_21066.cpp: In function 'int main()':
0_0_34317574_21066.cpp:4:36: error: 'scanf' was not declared in this scope
     while(scanf("%d/%d/%d",&y,&m,&d)!=EOF)
                                    ^
0_0_34317574_21066.cpp:4:39: error: 'EOF' was not declared in this scope
     while(scanf("%d/%d/%d",&y,&m,&d)!=EOF)
                                       ^
0_0_34317574_21066.cpp:28:18: error: 'printf' was not declared in this scope
     printf("%d",n);
                  ^