C语言文件相关，文件复制

#include<stdio.h>
void main()
{
char num[100],ch;
FILE*fp1,*fp2;
fp1=fopen("date.txt","r");
fscanf(fp1,"%s",num);
if(fp1==NULL){
printf("Open File Error");
return;
}
fp2=fopen("new.date","w");
if(fp2==NULL){
printf("Open File Error");
return;
}
ch=fgetc(fp1);
while(ch!=EOF){
fputc(ch,fp2);
ch=fgetc(fp1);
}
fprintf(fp2,"%s",num);
fclose(fp1);
fclose(fp2);
}

fp2=fopen("new.date","w");改成
fp2=fopen("newdate.txt","w")
文件类型要一样

date.txt是否存在，文件要和源文件放到一块儿