文件 复制问题

[huanhuan30]

#include <stdio.h>
#include <stdlib.h>
int main (int argc, char *argv[])
{
	FILE *in, *out;
	char ch;
    if (argc != 3)
    {
		fprintf(stderr, "filename source target...\n");
		exit(EXIT_FAILURE);
    }
	if ((in = fopen(argv[1], "rb")) == NULL)
	{
		fprintf(stderr, "Can't open %s \n", argv[1]);
		exit(EXIT_FAILURE);
	}
	if ((out = fopen(argv[2], "wb")) == NULL)
	{
		fprintf(stderr, "Can't open %s \n", argv[1]);
		exit(EXIT_FAILURE);
	}
	while ((ch = getc(in)) != EOF)
	{
		putc(ch, out);
	}
	fclose(in);
	fclose(out);
	return 0;
}

为什么 不能用来 复制 exe 文件。。。。。。

[lann64]

可以呀，不过最好使用unsigned char类型

[huanhuan30]

不可以的。。。输出的 EXE 不能 运行了。。。。

[ckt]

你不能以EOF作为结束标准

#include <stdio.h>
#include <stdlib.h>
int main (int argc, char *argv[])
{
    FILE *in, *out;
	char sData[32] = {0};
	int iRet = 0;
    if (argc != 3)
    {
        fprintf(stderr, "filename source target...\n");
        exit(EXIT_FAILURE);
    }
    if ((in = fopen(argv[1], "rb")) == NULL)
	{
        fprintf(stderr, "Can't open %s \n", argv[1]);
        exit(EXIT_FAILURE);
    }

    if ((out = fopen(argv[2], "wb")) == NULL)
    {
        fprintf(stderr, "Can't open %s \n", argv[2]);// argv[1] -> argv[2]
        exit(EXIT_FAILURE);
    }
    while (true)// 读完整个文件
    {
		iRet = fread(sData, 1, sizeof(sData), in); 
		if (iRet == 0)
			break;
		fwrite(sData, 1, iRet, out);
    }
    fclose(in);
    fclose(out);
    return 0;
}

[ckt]

你可以直接用api CopyFile

[huanhuan30]

#include <stdio.h>

#include <stdlib.h>

//#include <console.h>    /* Macintosh adjustment */

 

 

int main(int argc, char *argv[])

{

    int byte;

    FILE * source;

    FILE * target;

   

//    argc = ccommand(&argv);   /* Macintosh adjustment */

 

    if (argc != 3)

    {

        printf("Usage: %s sourcefile targetfile\n", argv[0]);

        exit(EXIT_FAILURE);

    }

   

 

    if ((source = fopen(argv[1], "rb")) == NULL)

    {

        printf("Could not open file %s for input\n", argv[1]);

        exit(EXIT_FAILURE);

    }

    if ((target = fopen(argv[2], "wb")) == NULL)

    {

        printf("Could not open file %s for output\n", argv[2]);

        exit(EXIT_FAILURE);

    }

    while ((byte = getc(source)) != EOF)

    {

        putc(byte, target);

    }

    if (fclose(source) != 0)

        printf("Could not close file %s\n", argv[1]);

    if (fclose(target) != 0)

        printf("Could not close file %s\n", argv[2]);

       

    return 0;

}

维护什么这个 可以。。复制后 的 exe 仍然可以用，，和我那个 有区别吗？？？

[太乙]

[Quote=引用 5 楼 huanhuan30 的回复:]
C/C++ code#include <stdio.h>

#include <stdlib.h>

//#include <console.h> /* Macintosh adjustment */





int main(int argc, char *argv[])

{

int byte;

FILE * source;

FILE * target;



// argc = ccommand(&argv); /* Macintosh adjustment */



if (argc != 3)

{

printf("Usage: %s sourcefile targetfile\n", argv[0]);

…
[/Quote]

没区别啊！！！

[ckt]

char类型的byte,如读到一个值超过char取值范围的数,会被进行转换.
如读到了255,赋值给byte后则为-1,退出循环.
int类型的byte则不会

[太乙]

[Quote=引用 7 楼 ckt1120 的回复:]
char类型的byte,如读到一个值超过char取值范围的数,会被进行转换.
如读到了255,赋值给byte后则为-1,退出循环.
int类型的byte则不会
[/Quote]

呵呵，够细心，没看到这定义不一样~~~