采用命令行方式复制任意多个文件内容到一个文件中（华科保研机试）

采用命令行方式复制任意多个文件内容到一个文件中，如下所示：

命令行形式：mycopy1.txt 2.txt 3.txt 4.txt ...

功能：复制2.txt3.txt 4.txt …的内容到1.txt中

#include <stdio.h>

#include <stdlib.h>

int main(int argc, char *argv[])
{
	char buffer[80] = {0};
	int i = 0;
	FILE *fout = NULL;
	FILE *fin  = NULL;

	if(argc < 3)
	{
		printf("please input right argument \n");
		return 1;
	}

	if(NULL == (fout = fopen(argv[1],"a+")))
	{
		printf("open output file failed\n");
		return 1;
	}

	for(i=2; i<argc; i++)
	{
		if(NULL == (fin = fopen(argv[i],"r")))
		{
			printf("open in file failed\n");
			return 1;
		}

		while(!feof(fin))
		{
			fread(buffer,sizeof(char),1,fin);
			fwrite(buffer,sizeof(char),1,fout);
		}

		fclose(fin);
	}

	fclose(fout);

    system("pause");
    return 0;
}