等级考试上机题目(上课用)(4)

第2套题

1．程序填空题

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

void WriteText(FILE *);

void ReadText(FILE *);

main()

{FILE *fp;

if((fp=fopen("myfile4.txt","w"))==NULL)

{printf(" open fail!!\n"); exit(0);}

WriteText(fp);

fclose(fp);

if((fp=fopen("myfile4.txt","r"))==NULL)

{printf(" open fail!!\n"); exit(0);}

ReadText(fp);

fclose(fp);

}

/**********found**********/

void WriteText(FILE ___1___)

{char str[81];

printf("\nEnter string with -1 to end :\n");

gets(str);

while(strcmp(str,"-1")!=0) {

/**********found**********/

fputs(___2___,fw); fputs("\n",fw);

gets(str);

}

}

void ReadText(FILE *fr)

{char str[81];

printf("\nRead file and output to screen :\n");

fgets(str,81,fr);

while(!feof(fr)) {

/**********found**********/

printf("%s",___3___);

fgets(str,81,fr);

4