C部分
#include <stdio.h>
#define MAXLEN 16384
FILE *f;
long offset=12345;
long len=678;
char str[MAXLEN];
void main(char *msg) {
    //char *msg="D:\\WisePOM_base\\rawsitedata\\20150211\\001@20150211165316.txt";
    char str2[MAXLEN];
    int *p1 = (int*)0;
    int *p2 = (int*)888;
    int n = (int)p1;
    int m = (int)p2;
    strncpy(str2,msg,sizeof(str2));
    f=fopen(str2,"rb");
    fseek(f,n,SEEK_SET);
    fread(str,1,m,f);
    fclose(f);
    str[len]=0;
printf("%s",str);
system("pause");
return str;
}