[Error] expected expression before '%' token

#include<stdio.h>
#define N 10
typedef struct
{
int stunum;
char name[50];
char major[50];
int age;
char phone[20];
}STU;
void insert(STU a[],int n,STU s1);
void delet(STU a[],int n,STU s1);
int main()
{
STU list
={{1001,"Zhang","computer",21,"123456"},{1004,"Zhao","computer",22,"5654556"},{1008,"Sun","computer",21,"9897786"}};
STU stu1,stu2;
printf("input insert data:");
scanf(%d,&stu1.num);
fflus(stdin);
gets(name);
fflus(stdin);
gets(major);
scanf(%d,&stu1.age);
fflus(stdin);
gets(phone);
insert(list,N,stu1);
printf("input delet data:");
scanf(%d,&stu2.num);
del(list,N,stu2);

}
void display(STU a[],int n)
{
for(i=0,i<n,i++)
{
printf("stu[num=%d],stu[name=%s]",a[i].num,a[i].name);
}

}
void insert(STU a[],int n,STU s1 )
{
int i,loc;

//loc
for(i=0;i<3;i++)
{
if(s1.stunum < a[i].stunum);
{
loc=i;
break;
}
}
//move
for(i=2;i<=loc;i--)
{
a[i]=a[i+1];
break;
}
//insert
a[loc]=s1;
}
void del(STU a[],int n,int num )
{
int i,loc;
//loc

//insert
for(i=0;i< N;i++)
{
if(s1.stunum == a[i].stunum);
{
loc=i;
break;
}
}
//move
for(i=loc;i<=3;i++)
{
a[i]=a[i+1];
break;
}
}