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Windows下的换行回车与Linux的回车

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Release: 2016-06-07 16:51:50
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Windows下的换行回车与Linux的回车的示例文本如下:fsad6546F5343646546345asfdsafsadfsda456749+8ASDFSAD现要读取第一行Windows

Windows下的换行回车与Linux的回车的示例文本如下:

fsad6546
F5343
646546345asfdsa
fsadfsda
456749+8
ASDFSAD

现要读取第一行

Windows下第一行结束是\r\n,8个字符之后是‘\r\n’,c语言fgetc读取时,第九个和第十个字符均为'\n',同时下一行的F是第11个字符

Linux下没有回车'\r',有换行,读完8个字符后是'\n',同时下一行的F是第十个字符

以下程序是读取文本文件,然后输出

(注意要先得到一行的长度)

#include
#include
#include

int main()
{

char *str,c;
str=(char*)malloc(1);

int k=0,sum=0;
FILE * pfile= fopen("test.txt","r");

while(1)
{
int i=0;
char d;
int k=ftell(pfile);
fseek(pfile,8,SEEK_SET);
c=fgetc(pfile);
while( c!='\n')
{

if(c==-1)
{
fseek(pfile,-i,SEEK_CUR);
goto first;
}
i++;
c=fgetc(pfile);
k=ftell(pfile);
}
k=ftell(pfile);
d=fgetc(pfile);
k=ftell(pfile);
fseek(pfile,-i-2,SEEK_CUR);//Linux下这要改为 fseek(pfile,-i-1,SEEK_CUR);


first:
free(str);
str=(char*)malloc(i+2);
if(fgets(str,i+2,pfile)==NULL)
{
break;
}

printf(str);

}
fclose(pfile);
return 0;
}

linux

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