View Compilation Error

0_0_36781924_677.cpp: In function 'int main()':
0_0_36781924_677.cpp:11:40: error: 'scanf' was not declared in this scope
     while (scanf("%d/%d/%d", &y, &m, &d) != EOF)
                                        ^
0_0_36781924_677.cpp:11:45: error: 'EOF' was not declared in this scope
     while (scanf("%d/%d/%d", &y, &m, &d) != EOF)
                                             ^
0_0_36781924_677.cpp:16:25: error: 'printf' was not declared in this scope
         printf("%d\n", s);
                         ^