{

int result = [](int a,int b) -> int { return a + b; }(2,4);

printf("%d\n", result);

auto func = [](int a, int b) -> int { return a + b; };

printf("%d\n", func(4, 3));

auto lambda = [](int x) { return x * 5; };

f(lambda);

f(g);

unsigned total = 0;

auto sum = [&total](int x) { total += x; return x * 3; };

f(sum);

f(sum);

printf("total %d\n", total);

total = 0;

f([&total](int x) { total += x; return x * 6; });

printf("total %d\n", total);

return 0;