照着书上调用fopen函数的例题打的代码,但运行后文件中并没有数据
#include<stdio.h>
#include<stdlib.h>
int main()
{
FILE *fp;
char ch,filename[10];
printf("请输入所用的文件名:");
scanf("%s",filename);
getchar();
if(fopen(filename,"w")==NULL)
{
printf("cannot open file\n");
exit(0);
}
fp = fopen(filename,"w");
printf("%d\n",*fp);
printf("请输入一个准备存储到磁盘的字符串(以#结束):");
ch = getchar();
while(ch!='#')
{
fputc(ch,fp);
putchar(ch);
ch = getchar();
}
fclose(fp);
putchar(10);
return 0;
}