/***@author cody*@date 2014-08-09*@description copy text file* FILE *fopen(filename,openmode)* fclose(FILE *stream)* int fseek(stream,offset,whence)* long ftell(stream)* void rewind(stream)*/#include <stdio.h>#include <stdlib.h>#include <string.h>int main(int argc, char const *argv[]){        FILE *fp = fopen("file","r+");    if(fp == NULL){        perror("open error");        exit(1);    }    /*if(fseek(fp,8,SEEK_SET) != 0){        perror("seek error");        exit(0);    }    long pos = ftell(fp);    printf("file current pos = %ld\n",pos );    fputc(‘W‘,fp);*/    fseek(fp,4,SEEK_SET);    fputs("Hello,my name is cody wu\nwhat‘s your name\n",fp);            fclose(fp);    return 0;}