真心求解啊

#include <stdio.h>
#include <stdlib.h>
void main()
{
int i,a[5],max,min,sum;
for(i=0;i<5;i++)
scanf("%d",&a[i]);
for(i=0;i<5;i++)
sum+=a[i];
for(i=0;i<5;i++)
{
if(a[i]>max) max=a[i];
if(a[i]<min) min=a[i];
}
printf("\n the sum is %d",sum);
printf("\n the max is %d",max);
printf("\n the min is %d\n",min);
}