母牛的故事 （C语言代码）

#include<stdio.h>

int main()

{

int old = 1, new1 = 0, new2 = 0, new3 = 0, year, total;

printf("please input the year.\n");

scanf_s("%d", &year);

while (year != 0)

{

while (year > 1)

{

old = old + new3;

new3 = new2;

new2 = new1;

new1 = old;

year--;

}

total = old + new1 + new2 + new3;

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

}

return 0;

}