ceasers cipher
Pages: 12
this is my code so far i want to make it encrypt the cod by move the letters 2 spots to the left on the alphabet how do i do this.i want to make it simple.
#include <iostream>
#include <string>
using namespace std;
int main(){
char question[] = "enter a password you want to encypt,it has to be only letters";
char password[60];
cout << question;
cin >> password;
system("pause");
return 0;
}
#include <iostream>
#include <string>
using namespace std;
int main(){
char question[] = "enter a password you want to encypt,it has to be only letters";
char password[60];
cout << question;
cin >> password;
system("pause");
return 0;
}
take each char in turn.
make it lower case.
subtract 2 from each char
if the char value is now less than 97, add 26 to it.
move on to next char
make it lower case.
subtract 2 from each char
if the char value is now less than 97, add 26 to it.
move on to next char
make it lower case.
subtract 2 from each char
if the char value is now less than 97, add 26 to it.
c = tolower(c);subtract 2 from each char
c= c-2;if the char value is now less than 97, add 26 to it.
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im new to c++ so i dont get what you are syaing.ok here i go.
so i have char password[60]; does that mean like do 60 c -2's.. can you like please explain the format to me
and what does this mean c = tolower(c);
and where did you get 97 and 26 from
so i have char password[60]; does that mean like do 60 c -2's.. can you like please explain the format to me
and what does this mean c = tolower(c);
and where did you get 97 and 26 from
| and what does this mean c = tolower(c); |
Look it up. It's a standard C function.
Use a proper C++ string so you don't have to worry about putting a zero at the end of it.
97 because the letter 'a' in ascii is represented by a char with the numerical value 97. 26 because there are 26 letter in the alphabet. Experiment with this code.
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Last edited on
You are not ready for this level. You should at least work through the entire tutorial.
The specific part of the tutorial you need is:
http://www.cplusplus.com/doc/tutorial/arrays/
The specific part of the tutorial you need is:
http://www.cplusplus.com/doc/tutorial/arrays/
| Thx what does [I] mean |
No offense but your questions are SO basic that I have to provide the obligatory link: http://cplusplus.com/doc/tutorial/
Please read through it so you won't need quite so much hand-holding. ;-)
BTW, I'm not trying to be mean and I'm sure Moschops doesn't need me protecting him. I just want you to know there are resources you can access yourself instead of posting every little question and waiting for a response.
Ok I already did the tutorial up to character sequences
Please just tell me what [I] means,please
Please just tell me what [I] means,please
why does the program need the variable i
and when i compile this why does it have an error on the underlined line
#include <iostream>
#include <cstring>
#include <srting>
using namespace std;
int main()
{
string c;
cin >> c;
for (int i = 0; i<c.size();i++)
{
c[i] = tolower(c[i]);
c[i] = c[i]-2;
if (c[i]<97)
{c[i] = c[i]+26;)
}
cout << c << endl;
system("pause");
return 0;
}
and when i compile this why does it have an error on the underlined line
#include <iostream>
#include <cstring>
#include <srting>
using namespace std;
int main()
{
string c;
cin >> c;
for (int i = 0; i<c.size();i++)
{
c[i] = tolower(c[i]);
c[i] = c[i]-2;
if (c[i]<97)
{c[i] = c[i]+26;)
}
cout << c << endl;
system("pause");
return 0;
}
ok now theres an error on the same line
#include <iostream>
#include <cstring>
#include <srting>
using namespace std;
int main()
{
string c;
cin >> c;
for (int i = 0; i<c.size();i++)
{
c[i] = tolower(c[i]);
c[i] = c[i]-2;
if (c[i]<97)
(c[i] = c[i]+26;)
}
cout << c << endl;
system("pause");
return 0;
}
#include <iostream>
#include <cstring>
#include <srting>
using namespace std;
int main()
{
string c;
cin >> c;
for (int i = 0; i<c.size();i++)
{
c[i] = tolower(c[i]);
c[i] = c[i]-2;
if (c[i]<97)
(c[i] = c[i]+26;)
}
cout << c << endl;
system("pause");
return 0;
}
| Ok I already did the tutorial up to character sequences Please just tell me what [I] means,please |
Hmmm, if you read (and understood) the tutorial up to character sequences you should have a grasp of control structures and arrays.
[i] is simply the common variable name when it's used to index an array. In the tutorial an [n] is used instead. Re-read that section with that in mind and see if it starts to click.
Pages: 12