求大佬解答c语言问题，无法运行

Question

#include<stdio.h>#include<stdlib.h>#define M 4struct student{ int Num; char Name[20]; int Score1; int Score2; int Average; char Grade; union  { char exemption; int score3; }SGrade;};char *search(struct student s1){ char *pt; pt=NULL; if(s1.Grade=='N') {if(s1.Score1<60||s1.Score2<60||s1.SGrade.score3<60) pt=&(s1.Name[20]);} else if(s1.Grade=='Y') {if(s1.Score1<60||s1.Score2<60) pt=&(s1.Name[20]);}return(pt);}void Ave(struct student stu[M]){ int i; for(i=0;i<M;i++) stu[i].Average=((stu[i].Score1)+(stu[i].Score2))/2;}void Rank(struct student *p){ struct student s1; int i,j,min=(*p).Average; for(i=0;i<M-1;i++) { for(j=1;j<M-i;j++) { if((*(p+i)).Average>(*(p+i+j)).Average) { min=(*(p+i+j)).Average; s1=*(p+i); *(p+i)=*(p+i+j); *(p+i+j)=s1; } } }}int main(){ char *c; int i; struct student stu[M]={{1,"Tom",80,90,0,'Y','A'},{2,"Mike",60,70,0,'N',89},{3,"Angel",90,95,0,'Y','A'},{4,"Bobo",50,90,0,'N',78}}; struct student *p; p=&stu[0]; for(i=0;i<M;i++) { printf("%d  %s  %d  %d  %d  %c  %s/n",stu[i].Num,stu[i].Name,stu[i].Score1,stu[i].Score2,stu[i].Average,stu[i].Grade,stu[i].SGrade);}    for(i=0;i<M;i++) { c=search(stu[i]); if(c!=NULL) printf("不及格的学生为%s/n",stu[i].Name); }    Ave(stu); Rank(p); for(i=0;i<M;i++) { printf("%d  %s  %d  %d  %d  %c  %c/n",stu[i].Num,stu[i].Name,stu[i].Score1,stu[i].Score2,stu[i].Average,stu[i].Grade,stu[i].SGrade.exemption); } FILE *fp;      char filename[10];      scanf("%s",filename);       if((fp=fopen(filename,"w"))==NULL)     {          printf("cannot open file\n");  exit(1); } for(i=0;i<M;i++) fwrite(&stu[i],sizeof(stu[i]),1,fp); fclose(fp); putchar(10); return 0;}

Answer 1

貌似少了分号