从键盘输入一行字符，写入一个文件， 再把该文件内容读出显示在屏幕上

[c]代码库

#include<stdio.h>
main()
{
	FILE *fp;
	char ch;
	if ( ( fp=fopen ( "string","wt+" ) ) ==NULL )
	{
		printf ( "Cannot open file strike any key exit!" );
		getch();
		exit ( 1 );
	}
	printf ( "input a string:\n" );
	ch=getchar();
	while ( ch!='\n' )
	{
		fputc ( ch,fp );
		ch=getchar();
	}
	rewind ( fp );
	ch=fgetc ( fp );
	while ( ch!=EOF )
	{
		putchar ( ch );
		ch=fgetc ( fp );
	}
	printf ( "\n" );
	fclose ( fp );
}