求解！？
#include<stdio.h>
struct students{
int num;
char name[50];
double score;
};
int main(void)
{
int n,i,j,index,temp;
struct student s[50]
while(scanf("%d",&n)!=EOF){
for(i=0;i<n;i++){
scanf("%d",&s[i].num);
scanf("%s",&s[i].name);
scanf("%d",&s[i].score);
}
for(i=0;i<n-1;i++){
index=i;
for(j=i+1;j<n;j++){
if(s[j].score>s[index].score)
index=j;
temp=s[index];
s[index]=s[i];
s[i]=temp;
}
}
for(i=0;i<n;i++)
printf("%d%s%d\n",s[i].num,s[i].name,s[i].score);
}
return 0;
}