#include "stdio.h"
#include “stdlib.h"
#define DEBUG(fmt,...) \
    printf(fmt,__VA_ARGS__)
    
void main(int argc, void *argv)
{
    int i=0;
    printf("argc=%d\n");
    for(i=0;i<argc;i++)
    {
        printf("arg %d : %s\n",i,argv[i])
    }
}

#define _DEBUG_ 1
 
#if _DEBUG_
#define PR(...) printf(__VA_ARGS__)
#else
#define PR(...) 
#endif

static char sprint_buf[1024];
int printf(char *fmt, ...)
{
va_list args;
int n;
va_start(args, fmt);
n = vsprintf(sprint_buf, fmt, args);
va_end(args);
write(stdout, sprint_buf, n);
return n;
}