cannot convert 'student' to 'const void*' for argument '1' to 'size_t fwrite(const void*,

怎么修改啊，求解
[Error] cannot convert 'student' to 'const void*' for argument '1' to 'size_t fwrite(const void*, size_t, size_t, FILE*)'
#include<stdio.h>
struct student
{
char num[6];
char name[9];
int score[3];
float ave;
}stu[5];
int main()
{
int i,j,sum=0;
FILE *fp;
for(i=0;i<5;i++)
{
printf("请输入No.%d科成绩:");
printf("stuNo:");
scanf("%s",stu[i].num);
printf("name:");
scanf("%s",stu[i].name);
for(j=0;j<3;j++)
{
printf("score %d",j+1);
scanf("%d",&stu[i].score[j]);
sum+=stu[i].score[j];}
stu[i].ave=sum/3.0;
}
fp=fopen("stud.txt","w");
for(i=0;i<5;i++)
if(fwrite(stu[i],sizeof(struct student),1,fp)!=1)
printf("flie write error\n");
fclose(fp);
}

修改如下，供参考：

#include<stdio.h>
struct student
{
    char num[6];
    char name[9];
    int score[3];
    float ave;
}stu[5];
int main()
{
    int i,j,sum=0;
    FILE *fp;
    for(i=0;i<5;i++)
    {
        printf("stuNo:");
        scanf("%s",stu[i].num);
        printf("name:");
        scanf("%s",stu[i].name);
        printf("请输入No.%d科成绩:\n",3);
        for(j=0,sum=0;j<3;j++)
        {
           printf("score %d:",j+1);
           scanf("%d",&stu[i].score[j]);
           sum+=stu[i].score[j];
        }
        stu[i].ave=sum/3.0;
    }
    fp = fopen("stud.txt","wt");
    for(i=0;i<5;i++){
        if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1)
        //fwrite(stu[i],sizeof(struct student),1,fp)
           printf("flie write error\n");
    }
    fclose(fp);
    return 0;
}