View Compilation Error

0_0_33223328_15100.cpp: In function 'int main()':
0_0_33223328_15100.cpp:8:15: error: 'scanf' was not declared in this scope
  scanf("%d",&t);
               ^
0_0_33223328_15100.cpp:17:44: error: 'printf' was not declared in this scope
    printf("%d\n",int(360-(fabs(ans1-ans2))));
                                            ^
0_0_33223328_15100.cpp:21:38: error: 'printf' was not declared in this scope
    printf("%d\n",int(fabs(ans1-ans2)));
                                      ^