已经修改了没错误，怎么有死循环？请帮忙！谢谢了！

[salyly]

我做的其实是个职工信息管理系统，不知对不对！不过我运行的时候，选OUTPUT便出现死循环，能帮忙排除一下吗？谢谢了！
#include<stdio.h>
struct person{ char name[8];
char id[15];
char sex[4];
char birth[10];
char prof[20];
char educat[20];
char salary[20];
char marriage[10];
};
char filename[20];
FILE *fp;
void creat();
void output();
void search();
void append();
void modify();
void delete();

main()
{ int m;

creat();
while(1)
{ printf("\n\ncreat please enter 1");
printf("\nsearch please enter 2");
printf("\nmodify please enter3");
printf("\ndelete please enter 4");
printf("\noutput please enter 5");
printf("\nexit please enter 0\n");
scanf("%d",&m);
if(m>=0&&m<=5)
{ switch(m)
{ case 1: append(); break;
case 2: search(); break;
case 3: modify(); break;
case 4: delete(); break;
case 5: output(); break;
case 0: exit();
}
printf("\n\nfinish,choose agian");
}
else printf("\n\nerror,choose again");
}
}
void creat()
{ struct person one;
long s1;

printf("\nenter file name");
scanf("%s",filename);
if((fp=fopen(filename,"w"))==NULL)
{ printf("\nfail！");
exit();
}
fprintf(fp,"%-6s%-8s%-8s-8s%-8s-8s%-8s-8s\n","name","id","sex","birth","prof","educat","salary","marriage");
printf("\nenter the name,id, sex,birth,prof,educat,salary and marriage(end with0)\n");
scanf("%s",one.name);
while(strcmp(one.name,"0"))
{ scanf("%s%s%s%s%s%s%s",one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
fprintf(fp,"%-6s%-8s%-8s-8s%-8s%-8s-8s%-8s\n",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
scanf("%s",one.name);
}
fclose(fp);
}

void output()
{ struct person one;

if((fp=fopen(filename,"r"))==NULL)
{ printf("\nfail");
exit();
}
printf("\n\n%50s\n","employee information system ");
while(!feof(fp))
{ fscanf(fp,"%-6s%-8s%-8s-8s%-8s-8s%-8s-8s\n","name","id","sex","birth","prof","educat","salary","marriage");
printf("%-6s%-8s%-8s-8s%-8s%-8s-8s%-8s\n",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
}
fclose(fp);
}

void append()
{ struct person one;

if((fp=fopen(filename,"a"))==NULL)
{ printf("\nfail");
exit();
}
printf("\nenter new created employee's name,id, sex,birth,prof,educat,salary and marriage\n");
scanf("%s%s%s%s%s%s%s",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
fprintf(fp,"%-6s%-8s%-8s-8s%-8s%-8s-8s%-8s\n",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
fclose(fp);
}

void search()
{ int k=0;
char namekey[8];
struct person one;

printf("\nenter name");
scanf("%s",namekey);

if((fp=fopen(filename,"rb"))==NULL)
{ printf("\nfail");
exit();
}
while(!feof(fp))
{ fscanf(fp,"%s%s%s%s%s%s%s%s\n",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
if(!strcmp(namekey,one.name))
{ printf("\n\nfind,here is");
printf("\n%-6s%-8s%-8s-8s%-8s%-8s-8s%-8s\n",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
k=1;
}
}
if(!k) printf("\n\nsorry,no such one");
fclose(fp);
}

void modify()
{ int m,k=0;
long offset;
char namekey[8];
struct person one;

printf("\nenter name");
scanf("%s",namekey);

if((fp=fopen(filename,"r+"))==NULL)
{ printf("\nfail");
exit();
}
while(!feof(fp))
{ offset=ftell(fp);
fscanf(fp,"%s%s%s%s%s%s%s%s\n",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
if(!strcmp(namekey,one.name))
{ k=1; break; }
}
if(k)
{ printf("\nfind,here is");
printf("\n%-6s%-8s%-8s-8s%-8s%-8s-8s%-8s",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
printf("\nenter new name,id,sex,birth,prof,educat,salary and marriage：");
scanf("%s%s%s%s%s%s%s%s",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
fseek(fp,offset,SEEK_SET);
printf("%ld",ftell(fp));
fprintf(fp,"%-6s%-8s%-8s-8s%-8s%-8s-8s%-8s\n",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
}
else printf("\nsorry,no such one");
fclose(fp);
}

void delete()
{ int m,k=0,flag;
long offset1,offset2;
char namekey[8], valid[4];
struct person one;

printf("\nenter name");
scanf("%s",namekey);
if((fp=fopen(filename,"r+"))==NULL)
{ printf("\nfail");
exit();
}
while(!feof(fp))
{ offset1=ftell(fp);
fscanf(fp,"%s%s%s%s%s%s%s%s\n",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
if(!strcmp(namekey,one.name))
{ k=1; break; }
}
if(k)
{ printf("\nfind,here is");
printf("\n%-6s%-8s%-8s%-8s%-8s%-8s%-8s%-8s",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);
printf("\nsure to del,enter 1；else，enter 0：");
scanf("%d",&m);
if(m) { fseek(fp,offset1,SEEK_SET);
fprintf(fp,"%-6s%-8s%-8s-8s%-8s%-8s-8s%-8s\n","","","","","","","","");
}
}
else printf("\nsorry,no such one");
fclose(fp);
}

[gernal_dn]

fscanf(fp,"%-6s%-8s%-8s-8s%-8s-8s%-8s-8s\n","name","id","sex","birth","prof","educat","salary","marriage");

//fscanf(fp,"%-6s%-8s%-8s-8s%-8s-8s%-8s-8s\n",one.name,one.id,one.sex,one.birth,one.prof,one.educat,one.salary,one.marriage);