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#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>
#include <time.h>
 
#define FCTR 8
 
void odd_even_merge(unsigned int* d, int n, int skip) {
  int idx,tmp;
  if (n > 2){
    odd_even_merge(d,        n / 2, skip * 2);
    odd_even_merge(d + skip, n / 2, skip * 2);
    for(idx = 1; idx <= n - 3; idx += 2) {
		if (d[idx * skip] > d[(idx + 1) * skip]) {
			tmp=d[idx * skip];
			d[idx * skip]=d[(idx + 1) * skip];
			d[(idx + 1) * skip]=tmp;}
			}
	} 
	else{
		if (d[0] > d[skip]){
			tmp=d[0];
			d[0]=d[skip];
			d[skip]=tmp;
			}
	}
}
 
void odd_even_mergesort(unsigned int* d/, int n) {
  if (n > 1) {
    odd_even_mergesort(d,         n / 2);
    odd_even_mergesort(d + n / 2, n / 2);
    odd_even_merge(d, n, 1);
  }
 
}
int main(void) {
	unsigned int* data;
	unsigned int elementSize = FCTR,counter;
 
		data = (unsigned int*)malloc(sizeof(unsigned int) * elementSize);
		for (counter = 0 ; counter < elementSize ; counter++ ){
			data[counter] = (unsigned int)((rand() / ((double)RAND_MAX+1.0f))* INT_MAX);
		}
 
		for (counter = 0 ; counter < elementSize ; counter++ ){printf("(%d)\n",data[counter]);}
		printf("\n");
		odd_even_mergesort(data, elementSize);
		printf("\n");
		for (counter = 0 ; counter < elementSize ; counter++ ){printf("(%d)\n",data[counter]);}
 
		free(data);
}

prog.c:29:40: error: expected ‘;’, ‘,’ or ‘)’ before ‘/’ token
 void odd_even_mergesort(unsigned int* d/, int n) {
                                        ^
prog.c: In function ‘main’:
prog.c:43:71: error: ‘INT_MAX’ undeclared (first use in this function)
    data[counter] = (unsigned int)((rand() / ((double)RAND_MAX+1.0f))* INT_MAX);
                                                                       ^
prog.c:43:71: note: each undeclared identifier is reported only once for each function it appears in
prog.c:48:3: warning: implicit declaration of function ‘odd_even_mergesort’ [-Wimplicit-function-declaration]
   odd_even_mergesort(data, elementSize);
   ^
prog.c:53:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Standard output is empty