View Compilation Error

0_0_27645780_4836.cpp: In function 'int main()':
0_0_27645780_4836.cpp:11:19: error: 'scanf' was not declared in this scope
     scanf("%d", &t);
                   ^
0_0_27645780_4836.cpp:17:21: error: 'getchar' was not declared in this scope
             getchar();
                     ^
0_0_27645780_4836.cpp:38:45: error: 'printf' was not declared in this scope
                     printf("%s ", a[i].color);
                                             ^
0_0_27645780_4836.cpp:40:40: error: 'printf' was not declared in this scope
                 printf("%s", a[i].color);
                                        ^