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;
A：5
B：6
C：7
D：8
正确答案：C
试卷来源：202403 CCF-GESP编程能力等级认证C++二级真题