我用键盘输入的信息至屏幕，然后保存入文件中，但是我打开保存信息的文件时，里边都是乱码
然而，我运行程序，从文件中读取信息时，却是正常的。也就是说直接打开文件看到的不是我要的结果，然而通过程序读文件时却是正常的。
想请问一下，怎么可以让直接打开文件时，里边的信息也是正常的？谢谢！

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>
#define HEADER1 " -----------------------------STUDENT-------------------------\n"
#define HEADER2 " |number    |name           |Comp|Math|Eng |sum |ave    |mici|\n"
#define HEADER3 " |----------|---------------|----|----|----|----|-------|----|\n"
#define FORMAT  " |%-10s|%-15s|%4d|%4d|%4d|%4d|%.2f  |%4d|\n"
#define DATA    p->data.num,p->data.name,p->data.cgrade,p->data.mgrade,p->data.egrade,p->data.total,p->data.ave,p->data.mingci
#define END     " ------------------------------------------------------------\n"
int saveflag=0;
struct student
{
    char num[10];
    char name[15];
    int cgrade;
    int mgrade;
    int egrade;
    int total;
    float ave;
    int mingci;
};
typedef struct Node
{
    struct student data;
    struct node *next;
}node,*link;
void menu()
{
    system("cls");
    textcolor(10);
    gotoxy(10,5);
    cprintf("                      The Students' Grade Mangement System  \n");
    gotoxy(10,8);
    cprintf("*****************************Menu********************************\n");
    gotoxy(10,9);
    cprintf("    *     1  input  record        2  delete  record       *\n");
    gotoxy(10,10);
    cprintf("    *     3  search record        4  modify  record       *\n");
    gotoxy(10,11);
    cprintf("    *     5  insert record        6  count  record        *\n");
    gotoxy(10,12);
    cprintf("    *     7  sort record          8  save  record         *\n");
    gotoxy(10,13);
    cprintf("    *     9  display record       0  quit  system         *\n");
    gotoxy(10,14);
    cprintf("*****************************************************************\n");
}
void printheader()
{
    printf(HEADER1);
    printf(HEADER2);
    printf(HEADER3);
}
void printdata(node *pp)
{
    node* p;
    p=pp;
    printf(FORMAT,DATA);
}
void disp(link l)
{
    node *p;
    p=l->next;
    if(!p)
    {
        printf("\n=====>not student record!\n");
        getchar();
        return;
    }
    printf("\n\n");
    printheader();
    while(p)
    {
        printdata(p);
        p=p->next;
        printf(HEADER3);
    }
    getchar();
}

void wrong()
{
    printf("\n\n\n\n\n*****************Error:input has wrong!press any key to continue*****************\n");
    getchar();
}
void nofind()
{
    printf("\n=====>not find this student!\n");
}
node* locate(link l,char findmess[],char nameornum[])
{
    node* r;
    if(strcmp(nameornum,"num")==0)
    {
        r=l->next;
        while(r)
        {
            if(strcmp(r->data.num,findmess)==0)
            return r;
            r=r->next;
        }
    }
    else if(strcmp(nameornum,"name")==0)
    {
        r=l->next;
        while(r)
        {
            if(strcmp(r->data.name,findmess)==0)
            return r;
            r=r->next;
        }
    }
    return 0;
}
void stringinput(char *t,int lens,char *notice)
{
    char n[255];
    do
    {
        printf(notice);
        scanf("%s",n);
        if(strlen(n)>lens)
            printf("\n exceed the required length!\n");
    }while(strlen(n)>lens);
    strcpy(t,n);
}
int numberinput(char *notice)
{
    int t=0;
    do{
        printf(notice);
        scanf("%d",&t);
        if(t>100||t<0)
            printf("\n score must in [0,100]!\n");
        }while(t>100||t<0);

    return t;
}
void add(link l)
{
    node *p,*r,*s;
    char ch,flag=0,num[10];
    r=l;
    s=l->next;
    system("cls");
    disp(l);
    while(r->next!=NULL)
        r=r->next;
    while(1)
    {
        while(1)
        {
            stringinput(num,10,"input number(press '0' return menu):");
            flag=0;
            if(strcmp(num,"0")==0)
                {return;}
            s=l->next;
            while(s)
            {
                if(strcmp(s->data.num,num)==0)
                {
                    flag=1;
                    break;
                }
                s=s->next;
            }
            if(flag==1)
            {
                getchar();
                printf("=====>The number %s is not existing,try again?(y/n):",num);
                scanf("%c",&ch);
                if(ch=='y'||ch=='Y')
                continue;
                else
                return;
                }
                else
                {break;}
            }
            p=(node *)malloc(sizeof(node));
            if(!p)
            {
                printf("\n allocate memory failure ");
                return ;
            }
            strcpy(p->data.num,num);
            stringinput(p->data.name,15,"Name:");
            p->data.cgrade=numberinput("C language score[0-100]:");
            p->data.mgrade=numberinput("Math score[0-100]:");
            p->data.egrade=numberinput("English score[0-100]:");
            p->data.total=p->data.egrade+p->data.mgrade+p->data.cgrade;
            p->data.ave=(float)(p->data.total/3);
            p->data.mingci=0;
            p->next=NULL;
            r->next=p;
            r=p;
            saveflag=1;
            }
    return;
}
void qur(link l)
{
    int select;
    char searchinput[20];
    node* p;
    if(!l->next)
    {
        system("cls");
        printf("=====>nostudent record!\n");
        getchar();
        return;
    }
    system("cls");
    printf("\n  ======>1 search by number  ======>2 search by name\n");
    printf("    please choice[1,2]");
    scanf("%d",&select);
    if(select==1)
    {
        stringinput(searchinput,10,"input the existing student number:");
        p=locate(l,searchinput,"num");
        if(p)
        {
            printheader();
            printdata(p);
            printf(END);
            printf("press any key to return");
            getchar();
        }
        else
        nofind();
        getchar();
    }
    else if(select==2)
    {
        stringinput(searchinput,15,"input the existing student name:");
        p=locate(l,searchinput,"name");
        if(p)
        {
            printheader();
            printdata(p);
            printf(END);
            printf("press any key to return");
            getchar();
        }
        else
        nofind();
        getchar();
    }
    else
    wrong();
    getchar();
}
void del(link l)
{
    int sel;
    node *p,*r;
    char findmess[20];
    if(!l->next)
    {
        system("cls");
        printf("\n=====>no student record!\n");
        getchar();
        return;
    }
    system("cls");
    disp(l);
    printf("\n      =====>1  delete by number      =====>2   delete by name\n");
    printf("        please choice[1,2]");
    scanf("%d",&sel);
    if(sel==1)
    {
        stringinput(findmess,10,"input the existing student number:");
        p=locate(l,findmess,"num");
        if(p)
        {
            r=l;
            while(r->next!=p)
            r=r->next;
            r->next=p->next;
            free(p);
            printf("\n=====>delete success!\n");
            getchar();
            saveflag=1;
        }
        else
        nofind();
        getchar();
    }
    else if(sel==2)
    {
        stringinput(findmess,10,"input the existing student name:");
        p=locate(l,findmess,"name");
        if(p)
        {
            r=l;
            while(r->next!=p)
            r=r->next;
            r->next=p->next;
            free(p);
            printf("\n=====>delete success!\n");
            getchar();
            saveflag=1;
        }
        else
        nofind();
        getchar();
    }
    else
    wrong();
    getchar();
}
void modify(link l)
{
    node *p;
    char findmess[20];
    if(!l->next)
    {
        system("cls");
        printf("\n=====>no student record!\n");
        getchar();
        return;
    }
    system("cls");
    printf("modify student recorder");
    disp(l);
    stringinput(findmess,10,"input the existing student number:");
    p=locate(l,findmess,"num");
    if(p)
    {
        printf("Number:%s,\n",p->data.num);
        printf("Name:%s,",p->data.name);
        stringinput(p->data.name,15,"input new name:");
        printf("C language score:%d,",p->data.cgrade);
        p->data.cgrade=numberinput("C language score[0-100]:");
        printf("Math score:%d,",p->data.mgrade);
        p->data.mgrade=numberinput("Math score[0-100]:");
        printf("English score:%d,",p->data.egrade);
        p->data.egrade=numberinput("English score[0-100]:");
        p->data.total=p->data.egrade+p->data.cgrade+p->data.mgrade;
        p->data.ave=(float)(p->data.total/3);
        p->data.mingci=0;
        printf("\n=====>modify success!\n");
        disp(l);
        saveflag=1;
    }
    else
    nofind();
    getchar();
}
void insert(link l)
{
    link p,v,newinfo;
    char ch,num[10],s[10];
    int flag=0;
    v=l->next;
    system("cls");
    disp(l);
    while(1)
    {
        stringinput(s,10,"Please input insert location after the number:");
        flag=0;v=l->next;
        while(v)
        {
            if(strcmp(v->data.num,num)==0) {flag=1;break;}
                v=v->next;
        }
        if(flag==1)
            break;
        else
        {
            getchar();
            printf("\n=====>The number %s is not existing,try again?(y/n):",s);
            scanf("%c",&ch);
            if(ch=='y'||ch=='Y')
                continue;
            else
            return;
        }
    }
    stringinput(num,10,"input new student number:");
    v=l->next;
    while(v)
    {
        if(strcmp(v->data.num,s)==0)
        {
            printf("=====>sorry,the new number:'%s' is existing !\n",num);
            printheader();
            printdata(v);
            printf("\n");
            getchar();
            return;
        }
        v=v->next;
    }
    newinfo=(node*)malloc(sizeof(node));
    if(!newinfo)
    {
        printf("\nallocate memory faolure ");
        return;
    }
    strcpy(newinfo->data.num,num);
    stringinput(newinfo->data.name,15,"Name:");
    newinfo->data.cgrade=numberinput("C language score[0-100]:");
    newinfo->data.mgrade=numberinput("Math score[0-100]:");
    newinfo->data.egrade=numberinput("English score[0-100]:");
    newinfo->data.total=newinfo->data.cgrade+newinfo->data.mgrade+newinfo->data.egrade;
    newinfo->data.ave=(float)(newinfo->data.total/3);
    newinfo->data.mingci=0;
    newinfo->next=NULL;
    saveflag=1;
    p=l->next;
    while(1)
    {
        if(strcmp(p->data.num,s)==0)
        {
            newinfo->next=p->next;
            p->next=newinfo;
            break;
        }
        p=p->next;
    }
    disp(l);
    printf("\n\n");
    getchar();
}
void tongji(link l)
{
    node *pm,*pe,*pc,*pt;
    node *r=l->next;
    int countc=0,countm=0,counte=0;
    if(!r)
    {
        system("cls");
        printf("\n=====>not student record!\n");
        getchar();
        return;
    }
    system("cls");
    disp(l);
    pm=pe=pc=r;
    while(r)
    {
        if(r->data.cgrade<60) countc++;
        if(r->data.egrade<60) counte++;
        if(r->data.mgrade<60) countm++;
        if(r->data.cgrade>=pc->data.cgrade) pc=r;
        if(r->data.egrade>=pc->data.egrade) pe=r;
        if(r->data.mgrade>=pc->data.mgrade) pm=r;
        if(r->data.total>=pc->data.total) pt=r;
        r=r->next;
    }
    printf("\n-----------the tongji result-------------------------------\n");
    printf("C language<60:%d(ren)\n",countc);
    printf("Math      <60:%d(ren)\n",countm);
    printf("English   <60:%d(ren)\n",counte);
    printf("-------------------------------------------------------------\n");
    printf("The highest student by total   score name:%s total score:%d\n",
    pt->data.name,pt->data.total);
    printf("The highest student by English score name:%s total score:%d\n",
    pe->data.name,pe->data.egrade);
    printf("The highest student by Math    score name:%s total score:%d\n",
    pm->data.name,pm->data.mgrade);
    printf("The highest student by C       score name:%s total score:%d\n",
    pc->data.name,pc->data.cgrade);
    printf("\n\npress any key to return");
    getchar();
}
void sort(link l)
{
    link ll;
    node *p,*rr,*s;
    int i=0;
    if(l->next==NULL)
    {
        system("cls");
        printf("\n=====>not student record!\n");
        getchar();
        return;
    }
    ll=(node*)malloc(sizeof(node));
    if(!ll)
    {
        printf("\n allocate memory failure!");
        return;
    }
    ll->next=NULL;
    system("cls");
    disp(l);
    p=l->next;
    while(p)
    {
        s=(node *)malloc(sizeof(node));
        if(!s)
        {
            printf("\n allocate memory failure!");
            return;
        }
        s->data=p->data;
        s->next=NULL;
        rr=ll;
        while(rr->next!=NULL&&rr->next->data.total>=p->data.total)
        { rr=rr->next;}
        if(rr->next==NULL)
        rr->next=s;
        else
        {
            s->next=rr->next;
            rr->next=s;
        }
        p=p->next;
        }
        l->next=ll->next;
        p=l->next;
        while(p!=NULL)
        {
            i++;
            p->data.mingci=i;
            p=p->next;
        }
    disp(l);
    saveflag=1;
    printf("\n   =====>sort complete!\n");
}
void save(link l)
{
    FILE *fp;
    node *p;
    int count=0;
    fp=fopen("student.txt","wb");
    if(fp==NULL)
    {
        printf("\n=====>open file error!\n");
        getchar();
        return;
    }
    p=l->next;
    while(p)
    {
        if(fwrite(p,sizeof(node),1,fp)==1)
        {
            p=p->next;
            count++;
        }
        else
        {
            break;
        }
    }
    if(count>0)
    {
        getchar();
        printf("\n\n\n\n\n=====>save file complete,total saved's record number is:%d\n",count);
        getchar();
        saveflag=0;
    }
    else
    {
        system("cls");
        printf("the current link is empty,no student record is saved!\n");
        getchar();
    }
    fclose(fp);
}

int main()
{
    link l;
    FILE *fp;
    int select;
    char ch;
    int count=0;
    node *p,*r;
    l=(node *)malloc(sizeof(node));
    if(!l)
    {
        printf("\nallocate memor failure ");
        return 0;
    }
    l->next=NULL;
    r=l;
    fp=fopen("student.txt","ab+");
    if(fp==NULL)
    {
        printf("\n======>can not open file!\n");
        exit(0);
    }
    do
    {
        p=(node *)malloc(sizeof(node));
        if(!p)
        {
            printf("memory malloc failure!\n");
            exit(0);
        }
        if(fread(p,sizeof(node),1,fp)==1)
        {
            p->next=NULL;
            r->next=p;
            r=p;
            count++;
        }
    }while(!feof(fp));
    fclose(fp);
    printf("\n======>open file success,the total records number is :  %d.\n",count);
    getchar();
      menu();
    while(1)
    {
        system("cls");
        menu();
        p=r;
        printf("               Please enter your choice(0~9): ");
        scanf("%d",&select);
        if(select==0)
        {
            if(saveflag==1)
            {
                getchar();
                printf("\n======>Whether save the modified record to file?(y/n)");
                scanf("%c",&ch);
                if(ch=='y'||ch=='Y')
                    save(l);
            }
            printf("=======>thank you for useness!");
            getchar();
        break;
        }
        switch(select)
        {
            case 1:add(l);break;
            case 2:del(l);break;
            case 3:qur(l);break;
            case 4:modify(l);break;
            case 5:insert(l);break;
            case 6:tongji(l);break;
            case 7:sort(l);break;
            case 8:save(l);break;
            case 9:system("cls");disp(l);break;
            default:wrong();getchar();break;
        }
    }
    return 0;
}

[ 本帖最后由 sxwsxw 于 2010-8-11 12:54 编辑 ]

可能是编码问题，你试试统一使用ASCII编码或者UTF8编码。
还有可能是你的代码问题，最好把代码发上来看看。

代码贴上了，我用WIN-TC，你帮我看看吧

[ 本帖最后由 sxwsxw 于 2010-8-11 12:58 编辑 ]

参考fwrite和fread函数说明。这个两个函数以n个字节块为单位。普通文本编辑器以一个字节为单位。用文本编辑器打开当然是乱码咯。如果是fprintf和fscanf可以满足你。