atoi for letters? HELP

[hermanny]

I am new here, but the site and the forum have both been realy useful for me.
Now, about my problem:
I have a char variable (c, for example) that is a 2 digit number and a single letter, with no space (example, 13b). I have to "separate" it in a int variable (i, for example) with just the number, and in a char variable (d, for example) with just the letter. For the number, I am using atoi:
i = atoi(c);
This way, i will be just the int part of c.
So, is there something like atoi, but that takes only letters? If this isn't, can you guys sujest something else?
Thak you!

[Athar]

char c=str[2]; ?

[hermanny]

No.
char c[50];
because this variable is used to multiple stuff, so it's content is constantly changing. In one point of the program, c will be like the example above.
Even if I use a diferent variable for this situation, with the right size, the variable can be a 2 digit number with one letter (13a) or a 1 digit number with one letter (4d).

[Computergeek01]

You could scan through the array with "isalpha(...)": http://www.cplusplus.com/reference/clibrary/cctype/isalpha/

What type of container is "c[]"? It may already have a built in member function, like "end()", to help you out.

[Athar]

You should use C++ streams.

stringstream ss(string(c,c+50)); //or just c if it is a null-terminated string
int number;
char ch;
ss >> number >> ch;

[hermanny]

I solved, using strpbrk. Thank you anyway.