#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
    FILE *fp1,*fp2;
    int i;
    char ch;
    if((fp1=fopen("e://1.txt","r"))==NULL)
    {
        printf("File open error\n");
        exit(0);
    }
    if((fp1=fopen("e://2.txt","w"))==NULL)
    {
        printf("File open error\n");
        exit(0);
    }
    while(1)
    {
            ch=fgetc(fp1);
        if(feof(fp1))
            break;
        fputc(ch,fp2);
    }
    if(fclose(fp1))
    {
        printf("Cant not close the file\n");
        exit(0);
    }
    if(fclose(fp2))
    {
        printf("Cant not close the file\n");
        exit(0);
    }
    return 0;
}

segmentation fault

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void copy()
{
    FILE *fp1,*fp2;
    int i;
    char ch;
    char *filenamer = "E:\\1.txt";
    char *filenamew = "E:\\2.txt";
    fp1 = fopen(filenamer, "r");
    fp2 = fopen(filenamew, "w");
    if (fp1 == NULL || fp2 == NULL){
        printf("加密失败\n");
        return;
    }
    while (1)
    {
         ch = fgetc(fp1);
        if (feof(fp1))
            break;
        fputc(ch, fp2);
    }
    if(fclose(fp1))
    {
        printf("Cant not close the file\n");
        exit(0);
    }
    if(fclose(fp2))
    {
        printf("Cant not close the file\n");
        exit(0);
    }
}
int main()
{
    copy();
    return 0;
}

为什么下面的那个可以运行；

求大神

if((fp1=fopen("e://1.txt","r"))==NULL)
 if((fp1=fopen("e://2.txt","w"))==NULL)
char *filenamer = "E:\\1.txt";
char *filenamew = "E:\\2.txt";
你看出区别没有

不是这个问题
我之前用"E:\\1.txt"我已经试过了，不能运行
用下面那个方法不管是"E:\\1.txt"还是"e://1.txt"都可以
搞不懂啊

照抄也不上心！

#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 int main()
 {
     FILE *fp1,*fp2;
     int i;
     char ch;
     if((fp1=fopen("e://1.txt","r"))==NULL)
     {
         printf("File open error\n");
         exit(0);
     }
     if((fp1=fopen("e://2.txt","w"))==NULL)
     {
         printf("File open error\n");
         exit(0);
     }
     while(1)
     {
             ch=fgetc(fp1);
         if(feof(fp1))
             break;
         fputc(ch,fp2);
     }
     if(fclose(fp1))
     {
         printf("Cant not close the file\n");
         exit(0);
     }
     if(fclose(fp2))
     {
         printf("Cant not close the file\n");
         exit(0);
     }
     return 0;
 }

前几次也有这样的问题，本来还以为是用的软件有问题呢，这种错误愣是没找出来，还调试了好久。
太感谢了。