求助求助，怎么改

Question

//尽可能少的改程序使得运行结果产生一个含10个welcome to\n字符串的temp.txt文件

#include<stdio.h>

#include<string.h>

int main(int argc,char*argv[])

{

int i=0;

FILE *fp=fopen("temp.txt","w+");

char string[]="WELCOME TO \n";

char secondstring[]="welcome to\n";

char temp[sizeof(string)];

for(i=0;i<10;i++)

  fputs(string,fp);

    fseek(fp,0,SEEK_SET);

    while((fgets(temp,sizeof(string),fp))!=NULL)

    {

    fseek(fp,-(long)sizeof(temp),1);

    fputs(secondstring,fp);

}

fclose(fp);

return 0;  

 }