C++Primer第五版：练习2.13 2.14

练习2.13

#include<iostream>

int i = 42;
int main()
{
    
    
	int i = 100;
	int j = i;
}

j的值为100

练习2.14

#include<iostream>

int main()
{
    
    
	int i = 0, sum = 0;
	
	for (int i = 0; i != 10; ++i)
		sum += i;

	std::cout << i << " " << sum << std::endl;
}

合法，输出0 45