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#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
#include <iomanip>
#include <string>
#include <string.h>
#include <iostream>
#include <conio.h>
#include <windows.h>
#include <cstdlib>
#include <fstream>
#include <bits/stdc++.h>
using namespace std;
HANDLE console = GetStdHandle(STD_OUTPUT_HANDLE); // used for goto
COORD CursorPosition; // used for goto
void gotoXY(int,int); // function defined below if this is new to you.
int main()
{
int menu_item=0, run, x=7,sub_item=0;
bool running = true;
int i,z=0,r,calc,strl,enstrl;
long long int rtotal=0;
char str[1000],ch[1000],enstr[1000],plus[1000];
long double a,b;
string test,agh;
ifstream afile;
srand (time(NULL));
gotoXY(18,5); cout << "Main Menu";
gotoXY(18,7); cout << "->";
while(running)
{
gotoXY(20,7); cout << "1) Encrypt";
gotoXY(20,8); cout << "2) Decrypt";
gotoXY(20,9); cout << "Quit Program";
system("pause>nul"); // the >nul bit causes it the print no message
if(GetAsyncKeyState(VK_DOWN) && x != 9) //down button pressed
{
gotoXY(18,x); cout << " ";
x++;
gotoXY(18,x); cout << "->";
menu_item++;
continue;
}
if(GetAsyncKeyState(VK_UP) && x != 7) //up button pressed
{
gotoXY(18,x); cout << " ";
x--;
gotoXY(18,x); cout << "->";
menu_item--;
continue;
}
if(GetAsyncKeyState(VK_RETURN)){ // Enter key pressed
rtotal=0;
sub_item=0;
strl = 0;
switch(menu_item){
case 0: {
system("cls");
cout << "Please enter a string:\t";
scanf(" %[^\n]s",str);
strl = strlen(str);
for(i = 0; i < strl; i++){
if(str[i]==' '){
str[i]='_';
}
ch[i]=str[i];
}
if(strl>9){
for(i = 10; i < strl; i++){
plus[i]=str[i];
str[i]='\0';
}
}
cout << strl << endl;
for(i = 0;i < strl; i++){
rtotal=rtotal*10;
r= rand() % 9 +1;
str[i] = str[i] - r;
rtotal=rtotal+r;
}
for(i = 0;i < strl; i++){
enstr[i]=str[i];
}
if(strl>10){
for(i = 10;i < strl; i++){
rtotal=rtotal*10;
r= rand() % 9 +1;
plus[i] = plus[i] - r;
rtotal=rtotal+r;
}
for(i = 9;i < strl; i++){
enstr[i]=plus[i];
}
}
a=rtotal;
while (a>10){
a=a/10;
}
for(i = 0;i <strl; i++){
str[i] = str[i] + trunc(a);
a=a-trunc(a);
a=a*10;
if(int(str[i])==int(ch[i])){
cout << str[i] << " checks out with " << ch[i] << "\n" << endl;
}else{
cout << str[i] << " misses "<< ch[i] <<" by " << (int(ch[i])-int(str[i])) << "\n" << endl;
enstr[i]=enstr[i]+(int(ch[i])-int(str[i]));
}
}
for(i = 10;i <strl; i++){
plus[i] = plus[i] + trunc(a);
a=a-trunc(a);
a=a*10;
if(int(plus[i])==int(ch[i])){
cout << plus[i] << " checks out with " << ch[i] << "\n" << endl;
}else{
cout << plus[i] << " misses "<< ch[i] <<" by " << (int(plus[i])-int(str[i])) << "\n" << endl;
enstr[i]=enstr[i]+(int(ch[i])-int(plus[i]));
}
}
enstrl = strlen(enstr);
for(i = strl;i < enstrl; i++){
enstr[i]='\0';
}
cout << "\nEncrypted string: " << enstr << endl;
cout << "\nEncryption key: " << rtotal << endl;
ofstream afile;
afile.open (".str");
afile << enstr <<" "<< rtotal ;
afile.close();
for(i = 0;i < strl; i++){
enstr[i]='\0';
}
system("pause");
system("cls");
gotoXY(18,5); cout << "Main Menu";
gotoXY(18,7); cout << "->";
break;
}
case 1: {
system("cls");
ifstream afile (".str");
afile >> test >> a;
int TempNumOne=test.size();
for (int d=0;d<=TempNumOne;d++){
str[d]=test[d];
}
cout << "\nEncrypted string: " << str <<endl;
cout << "\nEncryption key: " << a <<endl;
strl = strlen(str);
while (a>10){
a=a/10;
}
for(i = 0;i < strl; i++){
str[i] = str[i] + trunc(a);
a=a-trunc(a);
a=a*10;
}
for(i = 0; i < strl; i++){
if(str[i]=='_'){
str[i]=' ';
}
}
cout << "\nDecrypted string: " << str <<endl;
system("pause");
system("cls");
gotoXY(18,5); cout << "Main Menu";
gotoXY(18,8); cout << "->";
break;
}
case 2: {
gotoXY(20,16);
cout << "The program has now terminated!!";
running = false;
}
}
}
}
gotoXY(20,21);
}
void gotoXY(int x, int y)
{
CursorPosition.X = x;
CursorPosition.Y = y;
SetConsoleCursorPosition(console,CursorPosition);
}
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