Programming Forums > Application Development > C++

AA225 · Feb 2nd, 2005, 10:49 AM

hi all,

im trying to make a program that asks the user to input a series of numbers that correspond to various letters and symbols so that a words can be formed. I know how to prompt the user to enter the series of numbers but im stuck on two things:

after the user finishes entering the numbers i want "-1" to be the character to terminate the chain

i.e.

89 57 46 52 -1 <-end of message

and also how do i assign the number to letter and symbols?
i made a notepad file with all the assocation so would i just copy and paste it?

this is the key i have:

------------------------------
code char
2 = 0
16 = 1
31 = 2
92 = 3
55 = 4
67 = 5
42 = 6
1 = 7
97 = 8
32 = 9
48 = -
53 = (space=' ')
98 = !
89 = ,
79 = .
19 = ?
---------------
thats just some of it

i have just started learning c++ so i dont know all the advanced techniques to make this easier :o

as of now all i know is cout, cin, random values, while loop, if-else, do-while, and a bit about creating custom functions and would prefer to stick to this

any examples to help me get going would be greatly appreciated.

Ooble · Feb 2nd, 2005, 2:01 PM

Do you have to use that key? Using ASCII would make your app so much easier to code.

Mjordan2nd · Feb 2nd, 2005, 3:33 PM

First of all, I'm assuming that you're using some sort of loop to input your numbers. You could check for -1, and break the loop when a -1 is found.

For assigning a letter or symbol to a number, I would probably use a function that returns a char variable. You could use a bunch of if statements, or an array as such:

(Toggle Plain Text)

char symbol(int num)
{
     char sets[MAX];
     sets[2] = '0';
     sets[16]='1';
     /* and so on as you need*/

     return sets[num];
}

AA225 · Feb 2nd, 2005, 3:48 PM

Quote:

Originally Posted by Mjordan2nd

First of all, I'm assuming that you're using some sort of loop to input your numbers. You could check for -1, and break the loop when a -1 is found.

For assigning a letter or symbol to a number, I would probably use a function that returns a char variable. You could use a bunch of if statements, or an array as such:

(Toggle Plain Text)

char symbol(int num)
{
     char sets[MAX];
     sets[2] = '0';
     sets[16]='1';
     /* and so on as you need*/

     return sets[num];
}

i was hoping to have all the numbers be input at once is that possible with the method you told me

Broax · Feb 2nd, 2005, 4:19 PM

Shouldn't something like this:

(Toggle Plain Text)

#include <iostream>
using namespace std;

int main()
{
    int a;
    cin >> a;
    if (a==1);
    cout << 2;
    
    return 0;
    
}

Do the trick?

AA225 · Feb 2nd, 2005, 5:32 PM

im trying to get all the numbers to be input at once which is fine but what do i put to make read "-1" as a stopping point not another input

(Toggle Plain Text)

#include <iostream>
using namespace std;
char symbol(int number) //function declaration
int main()
{
int number;
char symbol, coded_message;

while (number!=-1)
{
cout<<"Enter your numbers: "<<endl;
cin>>number;
}
coded_message=char symbol(int number); //is this a correct function call?

cout<<coded_message;


//Im having a hard time getting the function definiton right
char symbol(int number) //function heading
{
char sets[2];
     sets[2] = '0';
     sets[16]='1';
/*just testing with two number to letter assignments*/
     return sets[number]
}

Mjordan2nd · Feb 2nd, 2005, 5:39 PM

I haven't compiled it, but there are a couple of things that I've noticed off the bat that are wrong with the program.

First of all, the function call is incorrect, and even if you had called it correctly, it would probably not do what you wanted it to. Firstly, the function call should look something like this:

(Toggle Plain Text)

coded_message = symbol(number);

Check out the following link for more information about functions: http://programmingforums.org/forum/showthread.php?t=83

Also, you need to declare the array large enough to hold each and every element. That array would need at least 17 different elements to be able to return sets[16].

For more information on arrays I suggest checking out: http://programmingforums.org/forum/s...ead.php?t=1644

suriyaa · Feb 3rd, 2005, 7:02 AM

did u know data types.Their is a way ,u should assigned the characters in unsigned character for '-1' ok

AA225 · Feb 3rd, 2005, 5:30 PM

how do i make an integer input terminate after "-1" is found

Mjordan2nd · Feb 3rd, 2005, 5:38 PM

You seem to be doing it alright in the code above.

Feb 2nd, 2005, 10:49 AM	#1
AA225 Newbie Join Date: Feb 2005 Posts: 4 Rep Power: 0	need help making a decoder newbie hi all, im trying to make a program that asks the user to input a series of numbers that correspond to various letters and symbols so that a words can be formed. I know how to prompt the user to enter the series of numbers but im stuck on two things: after the user finishes entering the numbers i want "-1" to be the character to terminate the chain i.e. 89 57 46 52 -1 <-end of message and also how do i assign the number to letter and symbols? i made a notepad file with all the assocation so would i just copy and paste it? this is the key i have: ------------------------------ code char 2 = 0 16 = 1 31 = 2 92 = 3 55 = 4 67 = 5 42 = 6 1 = 7 97 = 8 32 = 9 48 = - 53 = (space=' ') 98 = ! 89 = , 79 = . 19 = ? --------------- thats just some of it i have just started learning c++ so i dont know all the advanced techniques to make this easier :o as of now all i know is cout, cin, random values, while loop, if-else, do-while, and a bit about creating custom functions and would prefer to stick to this any examples to help me get going would be greatly appreciated.

Feb 2nd, 2005, 2:01 PM	#2
Ooble I eat cake for breakfast. Join Date: Jul 2004 Location: In my box. Posts: 4,434 Rep Power: 9	Do you have to use that key? Using ASCII would make your app so much easier to code. __________________ Me :: You :: Them

Feb 2nd, 2005, 3:33 PM	#3
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	First of all, I'm assuming that you're using some sort of loop to input your numbers. You could check for -1, and break the loop when a -1 is found. For assigning a letter or symbol to a number, I would probably use a function that returns a char variable. You could use a bunch of if statements, or an array as such: (Toggle Plain Text) char symbol(int num) { char sets[MAX]; sets[2] = '0'; sets[16]='1'; /* and so on as you need/ return sets[num]; } char symbol(int num) { char sets[MAX]; sets[2] = '0'; sets[16]='1'; / and so on as you need*/ return sets[num]; } __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

Feb 2nd, 2005, 4:19 PM	#5
Broax Hobbyist Programmer Join Date: Jan 2005 Location: Porto, Portugal Posts: 142 Rep Power: 4	Shouldn't something like this: (Toggle Plain Text) #include <iostream> using namespace std; int main() { int a; cin >> a; if (a==1); cout << 2; return 0; } #include <iostream> using namespace std; int main() { int a; cin >> a; if (a==1); cout << 2; return 0; } Do the trick? __________________ PORTUGALPORTUGA PORTUGALPORTUGA PORTUGALPORTUGA PORTUGALPORTUGA PORTUGALPORTUGA

Feb 2nd, 2005, 5:32 PM	#6
AA225 Newbie Join Date: Feb 2005 Posts: 4 Rep Power: 0	im trying to get all the numbers to be input at once which is fine but what do i put to make read "-1" as a stopping point not another input (Toggle Plain Text) #include <iostream> using namespace std; char symbol(int number) //function declaration int main() { int number; char symbol, coded_message; while (number!=-1) { cout<<"Enter your numbers: "<<endl; cin>>number; } coded_message=char symbol(int number); //is this a correct function call? cout<<coded_message; //Im having a hard time getting the function definiton right char symbol(int number) //function heading { char sets[2]; sets[2] = '0'; sets[16]='1'; /just testing with two number to letter assignments/ return sets[number] } #include <iostream> using namespace std; char symbol(int number) //function declaration int main() { int number; char symbol, coded_message; while (number!=-1) { cout<<"Enter your numbers: "<<endl; cin>>number; } coded_message=char symbol(int number); //is this a correct function call? cout<<coded_message; //Im having a hard time getting the function definiton right char symbol(int number) //function heading { char sets[2]; sets[2] = '0'; sets[16]='1'; /just testing with two number to letter assignments/ return sets[number] }

Feb 2nd, 2005, 5:39 PM	#7
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	I haven't compiled it, but there are a couple of things that I've noticed off the bat that are wrong with the program. First of all, the function call is incorrect, and even if you had called it correctly, it would probably not do what you wanted it to. Firstly, the function call should look something like this: (Toggle Plain Text) coded_message = symbol(number); coded_message = symbol(number); Check out the following link for more information about functions: http://programmingforums.org/forum/showthread.php?t=83 Also, you need to declare the array large enough to hold each and every element. That array would need at least 17 different elements to be able to return sets[16]. For more information on arrays I suggest checking out: http://programmingforums.org/forum/s...ead.php?t=1644 __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

Feb 3rd, 2005, 7:02 AM	#8
suriyaa Newbie Join Date: Feb 2005 Posts: 2 Rep Power: 0	did u know data types.Their is a way ,u should assigned the characters in unsigned character for '-1' ok

Feb 3rd, 2005, 5:30 PM	#9
AA225 Newbie Join Date: Feb 2005 Posts: 4 Rep Power: 0	how do i make an integer input terminate after "-1" is found

Feb 3rd, 2005, 5:38 PM	#10
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	You seem to be doing it alright in the code above. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

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Programming Forums > Application Development > C++

need help making a decoder newbie