C++中的lambda

#include<functional>
#include<iostream>

using namespace std;



function<int(int, int)> returnLambda(int &a,int b) {
	//将&a换为int a，则就会出现错误的结果
	return [&a,b](int x, int y) {
		a = a + 1;
		return x*y+a+b;
	};
}

int main() {
	int a = 3, b = 4;
	auto lf = returnLambda(a,b);
	cout << lf(12,5) << endl;
	
	system("pause");
	return 0;
}