文件，在操作台上进行自主文件拷贝，并进行自主命名。

#include<stdio.h>
#include<stdlib.h>
int main()
{
	FILE *infp,*outfp;
	char ch;char a[128],b[128];
	printf("请输入本文件目录中存在的文件名加后缀：");
	gets(a);//infile.txt
	printf("请输入输出文件名加后缀：");
	gets(b);
	if((infp=fopen(a,"r"))==NULL)
	{
		printf("cannot open %s\n",a);
	exit(0);
}
if((outfp=fopen(b,"w"))==NULL)//outfile.txt
{
	printf("cannot open out %s \n",b);
	exit(0);
}
#if 0
 
#else 
while(1)
{
	ch=fgetc(infp);
	if(ch==EOF)
		break;
	fputc(ch,outfp);
}
#endif
fclose(infp);
fclose(outfp);
printf("复制成功\n");
}