16-3.cpp

来自「effective stl 源代码 code」· C++ 代码 · 共 41 行

//
// Yet more examples from Item 16
//
// Fails under MSVC/native lib (lacks range insert)
//

#include <iostream>
#include <vector>
#include <cstring>
#include <set>
#include "ESTLUtil.h"

int data[] = { -30, 102, 55, -19, 0, 222, -3000, 4000, 8, -2 };
const int numValues = sizeof data / sizeof(int);

void doSomething(const int* pInts, size_t numInts)
{
	int sum = 0;
	for (size_t i = 0; i < numInts; i++)
		sum += pInts[i];
	std::cout << "Sum of ints in the array is " << sum << std::endl;
}


int main()
{
	using namespace std;
	using namespace ESTLUtils;

	set<int> intSet;								// set that will hold
													// data to pass to API
	intSet.insert(data, data + numValues);			// insert the ints in data
													// into the set
	vector<int> v(intSet.begin(), intSet.end());	// copy set data into	
													// a vector
	if (!v.empty()) doSomething(&v[0], v.size());	// pass the data to
													// the API

	return 0;
}