给定程序的功能是:从键盘输入若干行文本(每行不超过80个字符),写到文件myfile4.txt中(用-1作为字符串输入结束的标志),然后将文件的内容读出显示在屏幕上。文件的读/写分别由自定义函数ReadText()和WriteText()实现。
请在程序的下划线处填入正确的内容并把下划线删除,使程序得出正确的结果。
#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("\aEnter 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);