Using c to create h file

Question

I have a source file where a typedef struct is defined:

typedef struct {
    unsigned int seed;
} generator;

generator *create() {
    generator *g = (generator*)malloc(sizeof(generator));
    g->seed = time(0);
    
    return g;
}

void set_seed(generator *g, unsigned int s) {
    g->seed = s;
}

unsigned int rand_int(generator *g) {
    return g->seed = (a * g->seed) % m;
} 

I need to write header file, .h file. But I am keep getting

Undefined symbols for architecture x86_64:
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64

To avoid this error, please help me with writing the .h file.

Answer 1

Add this code snippet to your code:

int main(void) {}

You a lacking the main function in your program.