View Compilation Error

0_0_23217405_8231.cpp: In function 'int main()':
0_0_23217405_8231.cpp:6:27: error: 'scanf' was not declared in this scope
  while(scanf("%d %d",&m,&n)!=EOF)
                           ^
0_0_23217405_8231.cpp:6:30: error: 'EOF' was not declared in this scope
  while(scanf("%d %d",&m,&n)!=EOF)
                              ^
0_0_23217405_8231.cpp:21:24: error: 'printf' was not declared in this scope
   if(p==0)printf("no\n");
                        ^
0_0_23217405_8231.cpp:25:34: error: 'printf' was not declared in this scope
    if(q==p-1)printf("%d\n",num[q]);
                                  ^
0_0_23217405_8231.cpp:26:28: error: 'printf' was not declared in this scope
    else printf("%d ",num[q]);
                            ^