View Compilation Error

0_0_17566747_1125.cpp: In function 'void dijkstra(int, int)':
0_0_17566747_1125.cpp:44:40: error: 'printf' was not declared in this scope
     printf("%d %d\n",dis[end],cost[end]);
                                        ^
0_0_17566747_1125.cpp: In function 'int main()':
0_0_17566747_1125.cpp:50:26: error: 'scanf' was not declared in this scope
  while(scanf("%d%d",&n,&m)&&n||m)
                          ^