程序虽然很挫，但是凑活能看，运行后  结果数组filename1【10】  中会莫名其秒的出现个不认识的字符
  然后我 只能球大神帮助了  谢谢
#include<stdio.h>
#include<stdlib.h>
void main()
{
    FILE *fp;
    FILE *fp1;
    char ch,filename[10];
    char choose;
    scanf("%c",&choose);
    if(choose=='r')
    {
        scanf("%s",filename);
        if((fp=fopen(filename,"rt"))==NULL)
        {
            printf("cannot open this file\n");
            exit(0);
        }
        ch=getchar();
        while(!(feof(fp)))
        {
            ch=fgetc(fp);
            putchar(ch);
        }
        putchar(10);
        fclose(fp);
    }
    if(choose=='w')
    {
        scanf("%s",filename);
        if((fp=fopen(filename,"wt"))==NULL)
        {
            printf("cannot open this file\n");
            exit(0);
        }
        ch=getchar();
        ch=getchar();
        while(ch!='\n')
        {
            fputc(ch,fp);
            putchar(ch);
            ch=getchar();
        }
        putchar(10);
        fclose(fp);
    }
    if(choose=='c')
    {
        
        char a[50]={0};
        int cnt=1;
        int i;
        char filename1[10];
        char filename2[10];
        scanf("%s",filename1);
        scanf("%s",filename2);
        if((fp=fopen(filename1,"r"))==NULL)
        {
            printf("Cannot open this file");
            exit(0);
        }

            a[0]=fgetc(fp);
        while(!feof(fp))
        {
            a[cnt++]=fgetc(fp);
        }
        
        if((fp1=fopen(filename2,"w"))==NULL)
        {
            printf("Cannot open this file");
            exit(0);
        }
        for(i=0;i<cnt;i++)
        {
            ch=a[i];
            fputc(ch,fp1);
        }
        printf("%s\n",a);
        fclose(fp);
        fclose(fp1);
    }
}

您好，谢谢您的答案，但是
if(choose=='c')
    {
        
        char a[50]={0};
        int cnt=1;
        int i;
        char filename1[10];
        char filename2[10];
        scanf("%s",filename1);
        scanf("%s",filename2);
        if((fp=fopen(filename1,"r"))==NULL)
        {
            printf("Cannot open this file");
            exit(0);
        }

            a[0]=fgetc(fp);
        while(!feof(fp))
        {
            a[cnt++]=fgetc(fp);
        }
        
        if((fp1=fopen(filename2,"w"))==NULL)
        {
            printf("Cannot open this file");
            exit(0);
        }
        for(i=0;i<cnt;i++)
        {
            ch=a[i];
            fputc(ch,fp1);
        }
        printf("%s\n",a);
        fclose(fp);
        fclose(fp1);
    }
我要的结果不是绿色字体说的将正确的复制过去，而是红色字体中说的，走单步时候，那个数组中的数值是不正常的。求解答谢谢

这就是 feof函数的弊端所在 他多读取了一个数据  但是 应该怎么更改这个问题 求解？？  谢谢