C语言文件输出到txt出现乱码

#include<stdio.h>
#include<stdlib.h>
struct Student
{
   int num;
   char name[10];
   float score[3];
   float aver;
};
int main()
{
   FILE *fp;
   int i;
   struct Student person[5];
   for(i=0;i<5;i++)
   {
       printf("输入学生数据:");
       scanf("%d %s %f %f %f",&person[i].num,&person[i].name,&person[i].score[0],&person[i].score[1],&person[i].score[2]);
   person[i].aver=(person[i].score[0]+person[i].score[1]+person[i].score[2])/3;
       printf("平均成绩:%f\n",person[i].aver);
   }
   if((fp=fopen("stud.txt","wb"))==NULL)
   {
       printf("找不到文件\n");
       exit(0);
   }
for(i=0;i<5;i++)
   {
       if(fwrite(&person[0],sizeof(struct Student),1,fp)!=1)
       {
           printf("失败\n");
       }
       else
       {
           printf("成功\n");
       }
   }
   fclose(fp);
   return 0;
}