把电话本存入名为TEL.TXT文本文件…

#include<stdio.h>

void telbook(FILE*);

main()

{

 FILE *fp;

 char *filename;

 filename="TEL.TXT";

 if((fp=fopen(filename,"w"))==NULL)  //打开文件输出

 {

  printf("can't open the %s
file!\n",filename);

  exit(0);

 }

 telbook(fp);

 fclose(fp);

}

void telbook(FILE *f)

{ char name[20],tel[20];

scanf("%s%s",name,tel);

while(name[0]!='?')

{

 fprintf(f,"%s%s\n",name,tel);

 scanf("%s%s",name,tel);

}

}