13-02-03-01.cpp

more efftive 代码

#include <iostream>
#include <algorithm>
using namespace std;

int main()
{
  int A1[] = { 1, 2, 3, 4, 5, 6, 7 };
  int A2[] = { 1, 4, 7 };
  int A3[] = { 2, 7, 9 };
  int A4[] = { 1, 1, 2, 3, 5, 8, 13, 21 };
  int A5[] = { 1, 2, 13, 13 };
  int A6[] = { 1, 1, 3, 21 };
  
  const int N1 = sizeof(A1) / sizeof(int);
  const int N2 = sizeof(A2) / sizeof(int);
  const int N3 = sizeof(A3) / sizeof(int);
  const int N4 = sizeof(A4) / sizeof(int);
  const int N5 = sizeof(A5) / sizeof(int);
  const int N6 = sizeof(A6) / sizeof(int);
  
  cout << "A2 contained in A1: "
       << (includes(A1, A1 + N1, A2, A2 + N2) ? "true" : "false")
       << endl;
  cout << "A3 contained in A1: "
       << (includes(A1, A1 + N1, A3, A3 + N3) ? "true" : "false")
       << endl;
  cout << "A5 contained in A4: "
       << (includes(A4, A4 + N4, A5, A5 + N5) ? "true" : "false")
       << endl;
  cout << "A6 contained in A4: "
       << (includes(A4, A4 + N4, A6, A6 + N6) ? "true" : "false")
       << endl;
}