while循环解法

解题思路:相对于递归来讲我们要进行函数的跳转，所以我想用while循环进行解题（萌新初试，大佬勿喷）

注意事项:

参考代码:

#include<iostream>

using namespace std;

int main()

{

int Z, F, S, T;//定义初始奶牛数量，第一，二，三年奶牛数量

int Y;//年份

int year=1;//

int n;

int sum = 0;

Z = 1;

F = 0;

S = 0;

T = 0;

int temp;

cin >> Y;

while (Y!=0)

{

while (year<=Y)

{

sum = sum + Z;

if (year>=4)

{

Z = Z + T;

T = S;

S = F;

F = Z;

}

else

{

T = S;

S = F;

F = Z;

}

year++;

}

cout << sum << endl;

sum = 0;

Z = 1;

F = 0;

S = 0;

T = 0;

year = 1;

cin >> Y;

}

return 0;

}