关于结构体的问题 怎么把volume=length*width*high;加入程序里？

Question

#include<stdio.h>

struct student

{

int length,width,high,volume;

char name[8];

};//结构型定义结束一定要加分号

int main()

{

struct student stu[9];

int i,N,temp;

scanf("%d",&N);

for(i=0;i<N;i++)

scanf("%d%d%d%s",&stu[i].length,&stu[i].width,&stu[i].high,stu[i].name);

for(i=0;i<N;i++)

{

if(stu[i].volume>stu[i+1].volume)

{

temp=stu[i].volume;

stu[i].volume=stu[i+1].volume;

stu[i+1].volume=temp;

}

}

printf("%s took clay from %s\n",stu[N-1].name,stu[0].name);

return 0;

}