#include<stdio.h>
#include<conio.h>
#include<process.h>

void main()
{
 int i;
 int j;
 char num[5][10];
 FILE *fp=NULL;
 FILE *fp2=NULL;
 char *str;

 if((fp=fopen("c.txt","r"))==NULL)
  {
   printf("can not open file!\n");
   getch();
   exit(1);
  }
 if((fp2=fopen("b.txt","w+"))==NULL)
  {
   printf("can not open file!\n");
   getch();
   exit(1);
  }
  for(i=0;i<10;i++)
  {
   for(j=0;fgetc(fp)!='\n';j++)
   {   
     fseek(fp,-1L,1);
     num[i][j]=fgetc(fp);
   }
   num[i][j]='\n';
   num[i][j+1]='\0';
   str=num[i];
   
   printf("%s",str);//*****此处有输出*********
   fputs(str,fp2);//*******但在b文件中却什么都没有*******
  
  }
  fclose(fp);
  fclose(fp2);
}
这是我自己实验的一段小程序，是想将c中字符按行读出，写入b中，但却无法实现**
想请各位大神帮忙分析解决一下。。
小菜鸟不甚感激

也在等待中

在读写文件不常用for,这种程序读出写入的程序出问题，先看看是不是读到内容了，先输出一下看看，如果确定读到了，在看看是不是写入出现问题了。

不要怪我懒，现在很有好人能细看程序了，还是靠自己调试吧

fgets(buf,64,fp);//从文件fp中，提取64个字节的字符到指针数组buf中
fputs(buf,64,fp2);//从指针数组buf中给fp2中。
                                                                                                            先把文件的值赋给一个指针数组，然后把指针数组给文件2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

#include <stdio.h>
#include <stdlib.h>
int main()
{
int i;
int j;
char num[5][10];
FILE *fp=NULL;
FILE *fp2=NULL;
char *str;
if((fp=fopen("c.txt","r"))==NULL)
  {
   printf("can not open file!\n");
   getchar();
   exit(1);
  }
if((fp2=fopen("b.txt","w+"))==NULL)
  {
   printf("can not open file!\n");
   getchar();
   exit(1);
  }
  for(i=0;i<10;i++)//这里当i>4后，num数据就越界了
  {
   for(j=0;fgetc(fp)!='\n';j++)
   {  
     fseek(fp,-1L,1);
     num[i][j]=fgetc(fp);
   }
   num[i][j]='\n';
   num[i][j+1]='\0';
   str=num[i];
  
   printf("%s",str);//*****此处有输出*********
   fputs(str,fp2);//*******但在b文件中却什么都没有*******
 
  }
  fclose(fp);
  fclose(fp2);
  return 0;
}我用gcc调试的程序 没有问题，唯一一点就是数组越界了