这个本来是用来比较最大最小值的，为什么最后输出了-1

Question

#include<stdio. h>

#define max(a,b) ((а)>(b)?(а): (b))
int main (void)
｛
int x[5]=(0,2,1,3,-1];int biggest=x[0];

int i=1;
while(i<5)
{
 biggest-max (biggest, x[i++]);
 }

  printf ("%dln", biggest) ;

return 0;
}

Answer 1

    while(i<5) {
        biggest=max(biggest,x[i]);
        i++;
    }