Ask about error when declare "static inline int"

When I compile source code. There are this below error. Do you know how to solve this problem? Thank you.

Code

static inline int modnn(struct rs *rs,int x){
while (x >= rs->nn) {
x -= rs->nn;
x = (x >> rs->mm) + (x & rs->nn);
}
return x;
}


Compiling...
rs.c
e:\char.h(22) : error C2054: expected '(' to follow 'inline'
e:\char.h(22) : error C2085: 'modnn' : not in formal parameter list
e:\char.h(22) : error C2143: syntax error : missing ';' before '{'

Error executing cl.exe.

rs.exe - 3 error(s), 13 warning(s)

What compiler are you using? I'm using GCC 3.03 on Win98 and it works.

I've used this little code to compile.

Code:

---

struct rs
{
    int mm;
    int nn;
};

static inline int modnn (struct rs *rs,int x)
{
    while (x >= rs->nn) {
        x -= rs->nn;
        x = (x >> rs->mm) + (x & rs->nn);
    }
    return x;
}

int main()
{
    return 0;
}

---

I believe you'll find the inline keyword is for C++. That's what my compiler says anyways!

You both probably have a compiler which doesn't support the latest C standard, that standard introduced inline functions.