函数名: fgetpos

功 能: 取得当前文件的句柄

用 法: int fgetpos(FILE *stream，*fpos_t filepos);

程序例:

#include <string.h>

#include <stdio.h>

int main(void)

{

FILE *stream;

char string[] = "This is a test";

fpos_t filepos;

/* open a file for update */

stream = fopen("DUMMY.FIL", "w+");

/* write a string into the file */

fwrite(string, strlen(string), 1, stream);

/* report the file pointer position */

fgetpos(stream, &filepos);

printf("The file pointer is at byte\\

%ld\", filepos);

fclose(stream);

return 0;

}

程序例2:

void DeleteRowData(int RowNum)

{ /* typedef __int64 fpos_t1;*/

typedef fpos_t;

FILE *fin;

char strsub[20]; /**strsub 没显示*/

fpos_t pos_w;

fpos_t pos_r;

fpos_t pos;

int i,k,L=1;

char *one_line;

L=RowNum;

*strsub=0;

one_line = (char *) malloc(1000*sizeof(char));

fin = fopen ("data.TXT","rb+");

for (i=1;i<L;i++) fgets(one_line,999,fin);

fgetpos (fin,&pos_w); /*该函数在casio dt930上行不通，不解*/

fgets(one_line,999,fin);

fgetpos (fin,&pos_r);

pos = pos_r;

while (1 == 1)

{

fsetpos (fin,&pos);

if (fgets(one_line,999,fin) ==NULL) break;

fgetpos (fin,&pos_r);

pos = pos_w;

fsetpos (fin,&pos);

fprintf(fin,"%s",one_line);

fgetpos (fin,&pos_w);

pos = pos_r;

}

fclose(fin);

//sprintf(strsub,"%s,%d","test3",L);

//Display(7, 10,(UB *)" ", 0); /* 清空*/

//Display(7, 10,(UB *)strsub, 0);

return;