Workshop8-Problem1.c

#include <stdio.h>
#include <ctype.h>

#define TRUE 1
#define FALSE 0

int exist(char* filename)
{
	int existed = FALSE;
	FILE* f= fopen(filename,"r");
	if (f!=NULL)
	{
		existed = TRUE;
		fclose(f);
	}
	return existed;
}

int writeFile(char* filename)
{
	char c;
	int CTRL_Z = -1;
	if (exist (filename) == TRUE)
	{
		printf("The file %s existed. Override it Y/N?:", filename);
		if(toupper(getchar()) == 'N')
			return FALSE;
	}
	FILE* f = fopen(filename, "w");
	fflush(stdin);
	do
	{
		c = getchar();
		if (c != CTRL_Z)
			fputc(c,f);
	}
	while (c != CTRL_Z);
	fclose(f);
	return TRUE;
}

int main(int argCount, char* args[])
{
	
	if (argCount != 2)
		printf("Syntax: copy_con filename\n");
	else if (writeFile(args[1]) == TRUE)
		printf("Writting the file %s: done\n", args[1]);
	else
		printf("Can not write the file %s\n", args[1]);
		return 0;
}

int printFile(char* filename)
{
	char c;
	if (exist (filename) == FALSE)
	{
		printf("The file %s does not exist.\n", filename);
		return FALSE;
	}
	FILE* f = fopen(filename, "r");
	while ((c = fgetc(f)) != EOF)
		putchar(c);
	fclose(f);
	return TRUE;
}