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本帖最后由 jan1990 于 2011-12-23 19:39 编辑
#include <sys/types.h>
#include <stdio.h>
#define BUF_SIZE 1024
int main(void)
{
char buf[BUF_SIZE]={'\0'};
FILE *source, *backup;
if((source=fopen("source.dat", "rb"))==NULL)
{
printf("Error in opening file.\n");
exit(1);
}
if((backup=fopen("backup.dat", "wb"))==NULL)
{
printf("Error in creating file.\n");
exit(1);
}
while(1)
{
fread(buf, sizeof(buf), 1, source);
if(!fwrite(buf, sizeof(buf), 1,backup))
{
printf("Error in wrinting file.\n");
exit(1);
}
if(feof(source)) break;
fseek(source,sizeof(buf),1);
fseek(backup,sizeof(buf),1);
}
if(ferror(source))
{
printf("Error in reading file.\n");
exit(1);
}
if(fclose(source))
{
printf("Error in close file.\n");
exit(1);
}
if(fclose(backup))
{
printf("Error in close file.\n");
exit(1);
}
}
请问我这个程序哪里出错了?运行的时候我不能打开backup.dat文件,我不知道是哪里出错了。。求指教 |
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