Changing the value of an varibale in an if statement?

Being the c newbie that I'm I have a question about changing the value of an variable in an if statement. Since I only have experience from matlab where this works like a charm I wonder if it's the same for C. I'll give an example if you don't understand what i mean.

Code:

---

int w = 1;
int b = 2;
int c = 3;

if(w==1){
    b=b+1;
}

int a = b+c;

---

This will give a=6 right? I don't need to use pointers to change the value with an if statment?

yep, seems that way.

Certainly, that would work.. are u getting an error?

Might get an error for not declaring a at the start of the block though?