#include<stdio.h>
#include<math.h>
#include<windows.h>
#include<locale.h>
#include<time.h>

void shiftAll(char text[20000],int len,int c,char dir)
{
	if(dir == '+')
	{
		for(int i = 0;i<len;i++)
		{
			text[i] = text[i] + c;
		}
	}
	else if(dir == '-')
	{
		for(int i = 0;i<len;i++)
		{
			text[i] = text[i] - c;
		}
	}
}

int trueChar(char c)
{
	if((c<224) || (c>255)) return 0;
	else return 1;
}


int main()
{
	srand(time(0));
	setlocale(0, "");
	char text[20000];
	char text2[20000];

	FILE* f = fopen("TextRus.txt","r");
	FILE* g = fopen("TextRus1.txt","w");
	int len = 0;
	while(fscanf(f,"%c",&text[len++]) != EOF);
	len--;
	for(int i = 0;i<len;i++)
	{
		printf("%c",text[i]);
	}
	int shift = rand()%255 + 1;
	for(int i = 0;i<len;i++)
	{
		fprintf(g,"%c",text[i]+shift);
		text2[i] = text[i]+shift;
	}

	fclose(f);
	fclose(g);

	printf("\n");
	g = fopen("TextRus1.txt","r");
	int sh = 1;

	for(int i = 0;i<len;i++)
	{
		printf("%c",text2[i]);
	}

	int k = 0;


	for(sh = 1;sh <= 255;sh++)
	{
		k = 0;
		shiftAll(text2,len,sh,'+');
		for(int i = 0;i<len;i++)
		{
			if(trueChar(text2[i]) == 1)
			k++;
		}
		if(k == len) break;
		else shiftAll(text2,len,sh,'-');
	}

	if(sh <=255)
	{
		for(int i = 0;i<len;i++)
		{
			printf("%c",text2[i]);
		}
	}
	else printf("ne udalos");







	//while(fscanf(g,"%c",&sh) != EOF){printf("%c",sh);}
	fclose(g);

	//while(())
	/*for(int i = 0;i<=255;i++)
	{
		printf("%c - %i\n",(char)i,i);
	}*/


	system("pause>0");
	return 0;
}