求大神解答一下！程序编译通过，总是停止运行。

Question

int* qiuyu(int n,int i)
{
int sum;
static int m=2;
sum[i]=n%m;
m=2;
n-=sum[i];
if(sum[i]==0) /*求n的2次方之和*/
return qiuyu(n,i);
if(n==0)
return sum;
else
return qiuyu(n,++i);

}

int main(void)
{ int m;
int *sum,n=27,i=0;
sum=qiuyu(n,i);
m=sizeof(sum)/sizeof(int);
printf("%d",m);

}

Answer 1

那个sum变量是怎么回事哦