View Compilation Error

0_0_34616931_26637.cpp: In function 'int main()':
0_0_34616931_26637.cpp:3:15: error: 'scanf' was not declared in this scope
  scanf("%d",&m);
               ^
0_0_34616931_26637.cpp:7:27: error: 'EOF' was not declared in this scope
   while((scanf("%d",&n))!=EOF&&n)
                           ^
0_0_34616931_26637.cpp:15:19: error: 'printf' was not declared in this scope
    printf("%d\n",s);
                   ^