View Compilation Error

0_0_24471143_18061.cpp: In function 'int main()':
0_0_24471143_18061.cpp:4:15: error: 'scanf' was not declared in this scope
  scanf("%d",&n);
               ^
0_0_24471143_18061.cpp:6:3: error: 'string' was not declared in this scope
   string s;
   ^
0_0_24471143_18061.cpp:7:3: error: 'cin' was not declared in this scope
   cin >> s;
   ^
0_0_24471143_18061.cpp:7:10: error: 's' was not declared in this scope
   cin >> s;
          ^
0_0_24471143_18061.cpp:13:26: error: 'f' was not declared in this scope
    long long ab=f(s,0,i-1);
                          ^
0_0_24471143_18061.cpp:21:48: error: 'printf' was not declared in this scope
    printf("%lld-%d*%d/%lld=%lld\n",ab,c,d,e,end);
                                                ^
0_0_24471143_18061.cpp:24:37: error: 'printf' was not declared in this scope
   printf("Case #%d: %lld\n",_i+1,max);
                                     ^