库函数调用 5--fseek

#include <stdio.h>





/***************************
*name:fseek.c
*author:QG
*time :2015-05-12
*description:
****************************/

int main()
{
    FILE *fp_in;
    char *in_file_name = "./123.txt";
    char c_buf[10];
    int a = 0;
    fp_in = fopen(in_file_name,"r+");

    a  = fseek(fp_in,2,SEEK_SET);
    if(a == 0)
    {
        printf("location OK!\n");
    }
    else if(a == -1)
    {
        printf("location fail!\n"); 
    }

    fread(c_buf,1,9,fp_in);
    c_buf[9] = '\0';

    printf("read content is : %s!\n",c_buf);
    close(fp_in);
    return 0;
}