View Compilation Error

0_0_18893276_3650.cpp: In function 'int main()':
0_0_18893276_3650.cpp:14:21: error: 'sprintf' was not declared in this scope
   sprintf(N, "%d", i);
                     ^
0_0_18893276_3650.cpp:27:30: error: 'scanf' was not declared in this scope
  while (scanf("%d %d", &n, &m) != EOF && (n || m))
                              ^
0_0_18893276_3650.cpp:27:35: error: 'EOF' was not declared in this scope
  while (scanf("%d %d", &n, &m) != EOF && (n || m))
                                   ^
0_0_18893276_3650.cpp:29:37: error: 'printf' was not declared in this scope
   printf("%d\n", num[m + 1] - num[n]);
                                     ^