【C语言\自留记录】用do while求斐波那契数列第n项

#include<stdio.h>
int main()
{
	int x=0,y=1,i=2,n;
	printf("请输入斐波那契数列的第n项为:\n");
	scanf("%d",&n);
	if(n==1)
		y;
	else 
		do
		{
			i++;
			y=x+y;
			x=y-x;
		}
		while(i<=n);
		printf("斐波那契数列的第%d项为%d\n",n,y);
		return 0;
}