Thread: using an input variable within a variable name

My solution is store all your string in the characted pointer and you take the number from the user as an input and you increment that pointer to the takes value and print the string .And you will get the expedated string...

Two obvious solutions:
1. Using a table to convert from "number to name":

Code:

struct {
   int cake;
   char *name;
} cakeToString[] = 
{
    { 225, cake225 },
    { 261, cake261 }, 
    ...
    { 0, NULL }
};

Then walk through the list and find the cake number, and use the name.

2. Use a switch statement:

Code:

char *getCakeName(int cake)
{
   switch(cake) {
     case 225:  return cake225;
     case 261: return cake 261;
     ... 
     default: return "Invalid Cake";
   }
}

There are further solutions, but those are the first two that comes to mind. Which you prefer depends quite a bit on what the rest of the code is supposed to do, and perhaps you actually need some more functionality to be performed.

--
Mats

There is no way (as far as I know) to pick a variable by name like cake + (some number). That's just not how the compiler works. However, you can find another solution to the problem of picking a cake. I can think of two solutions there:

1. A 2 dimensional array of chars (probably best implemented with pointers) where the first dimension is the codenum so cake255 would really be cake[255]. I don't recommend this because your cake numbers don't start at 0 or increment in a decent pattern.

2. A list of cake names and a list of cake numbers. You can search through the cake numbers then pick out the corresponding cake name. Personally, I would wrap those 2 variables into a structure:

Code:

struct CAKE
{
     char name[256];
     int number;
};

Originally Posted by Brad0407

There is no way (as far as I know) to pick a variable by name like cake + (some number).

It's possible, with a map. But that's probably way too complicated for this purpose, especially in C.
Oh and main should explicitly return int. Don't leave put return type on your functions!

Code:

main() /* Bad */
int main() /* Good! */

> char cake225[] = "Chocolate Eclair";
> char cake261[] = "Vanilla Slice";
So can we assume that you start with
char cake001[] = "Sponge";
char cake002[] = "Chocolate";
and so on all the way up to the numbers you've listed?

Making me hungry.

But anyway, if Salem is right and you actually do have many, many cakes, consider putting them into a file, or even multiple files (if you actually have thousands ) .

It works, if you make it an array:

Code:

char mystr[10][50];
strcpy(mystr[0], "My question 1");
/* Etc */
for (i=1; i <=numQuestions; i++)
        printf ("&#37;s", q[i]); // where q+i represents q1 then q2 then q3 etc.