Programming

#include <stdio.h>
// for execlp()
#include <unistd.h>

int main()
{
  const char *script="echo";
  const char *prefix="";
  int pos=0, n;
  char buf[256];
  int a[3]={1,2,3};

  for(n=0; n<3; n++)
  {
    pos+=snprintf(buf+pos, 256-pos, "%s%d", prefix, a[n]);
  }
  printf("will call %s with %s\n", script, buf);

  // Note that this command never returns unless it fails to run at all.
  execlp(script, script, buf, NULL);
  // If the program is still running, then execlp failed, so return error
  return(1);
}