View Compilation Error

0_0_19216746_23445.cpp: In function 'int main()':
0_0_19216746_23445.cpp:58:15: error: 'scanf' was not declared in this scope
  scanf("%d",&t);
               ^
0_0_19216746_23445.cpp:82:58: error: 'printf' was not declared in this scope
    printf("%d\n",dis[p[i].x]+dis[p[i].y]-2*dis[p[i].node]);
                                                          ^