View Compilation Error

0_0_24803873_6231.cpp: In function 'int main()':
0_0_24803873_6231.cpp:5:26: error: 'scanf' was not declared in this scope
  while(scanf("%d%d",&m,&n)!=EOF)
                          ^
0_0_24803873_6231.cpp:5:29: error: 'EOF' was not declared in this scope
  while(scanf("%d%d",&m,&n)!=EOF)
                             ^
0_0_24803873_6231.cpp:16:28: error: 'printf' was not declared in this scope
   printf("%d %d %d\n",x,y,s);
                            ^