Question

I am programming in C and I have a character array filled with letters/numbers. I want to compare the first two values together as one number or combo.

char values[8];
//a value of this might be 245756
switch (values[0 and 1]){
   case 24:
     do something;
   case 45:
     do something else;
}

Do I have to concatenate or what if I want to combine the two values and then see if they equal some set of combinations?

Thanks!

Please let me know if I am being unclear.

Answer 1

I’m assuming that your char array holds the characters '2', '4', etc.

In which case, you can convert a character to its equivalent integer value as follows:

char x = '2';
int  y = x - '0';

So all you need to do is perform this calculation for each of values[0] and values[1], and then perform the base-10 maths to combine these into a single integer value.

If your char array already holds the integer value for each digit, then you can of course skip the conversion, and jump straight to the base-10 maths.