View Compilation Error

0_0_15274335_24904.cpp: In function 'int main()':
0_0_15274335_24904.cpp:5:24: error: 'scanf' was not declared in this scope
     while(scanf("%d",&n)!=EOF)
                        ^
0_0_15274335_24904.cpp:5:27: error: 'EOF' was not declared in this scope
     while(scanf("%d",&n)!=EOF)
                           ^
0_0_15274335_24904.cpp:22:41: error: 'printf' was not declared in this scope
         printf("%d %d %d\n",fu,lin,zheng);
                                         ^