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C Quellcode

typedef struct _BMP_ bmp;
typedef unsigned char byte;
 
byte g_bmp_id[3] = {0x42, 0x4d, 0x46 };
 
struct _BMP_
{
	byte *ptr_file_id;
	byte *ptr_file_data;
};
 
int main(int argc, char *argv[])
{
char filename[FILENAME_MAX + 1];
	char appdx[6] = ".bmp";
	FILE *file;
	bmp *o_bmp;
	byte data[4] = {0xff, 0xb7, 0xc5, 0x3a};
 
printf("Bitte geben Sie einen Dateinamen ein:\n");
	printf(">");
	gets(filename);
	o_bmp->ptr_file_id = g_bmp_id;
	o_bmp->ptr_file_data = data;
 
	file = fopen(filename, "r");
	if(file != NULL)
	{
		printf("Datei %s existiert bereits.\n", filename);
		if(fclose(file) == EOF) printf("Fehler beim Schliessen der Datei.\n");
		return 1;
	}
	else
	{
		strcat(filename, appdx);
		file = fopen(filename, "wb");
		if(file != NULL)
		{
			fwrite(o_bmp->ptr_file_id, sizeof(o_bmp->ptr_file_id), sizeof(o_bmp->ptr_file_id), file);
			fwrite(o_bmp->ptr_file_data, sizeof(o_bmp->ptr_file_data), sizeof(o_bmp->ptr_file_data), file);
			fclose(file);
			printf("Ready.\n");
		}
 
	}
	return 0;
}