char find_min_err( int gain ){
 char ma;
 int a,b;
 int err=32767;
 for(a=1;a<16;a++){
  for(b=0;b<16;b++){
   if((a*b)>gain ) continue;
   else{
    if((gain-(a*b))<=err){
     err = (gain-(a*b));
     ma=(char)((a>=b)?(a):(b));
    }}}}
 return ma;
}
void NOD( unsigned int gain ){
 if(gain < 16)
    printf("%d \t 0x%02x\n", gain, gain);
  else
    printf("%d \t 0x%02x\n", gain, find_min_err(gain));
}
void main(void){
 unsigned int x; 
 for( x=0; x<256; x++){
   NOD(x);
   if((x&0x0f)==0x0f)
     printf("\n"); // не убирать 
  }
}