下面C++代码执行后的输出是？（）
int n, masks, days,cur;n = 17, masks = 10, days = 0;cur = 2;while (masks != n){ if (cur == 0 || cur == 1) masks += 7; masks -= 1; days += 1; cur = (cur + 1) % 7;} cout << days;下面C++代码执行后的输出是？（）
int n, masks, days,cur;n = 17, masks = 10, days = 0;cur = 2;while (masks != n){ if (cur == 0 || cur == 1) masks += 7; masks -= 1; days += 1; cur = (cur + 1) % 7;} cout << days;