#include <cstdio>
 
#if defined(_MSC_VER) || defined(__BORLANDC__)
#define Q64 "%I64d\n"
#define OCT(i) i##I64
typedef __int64 oct64;
#else
#define Q64 "%lld\n"
#define OCT(i) i##LL
typedef long long oct64;
#endif
 
//16 -> 8
oct64 hex_to_oct(unsigned int h){
	oct64 o = OCT(0), d = OCT(1);
	for(; h != 0; h >>= 3){
		o += (oct64)(h & 0x7) * d;
		d *= OCT(10);
	}
	return o;
}
 
 
int main(void){
	//проверка
	printf(Q64, hex_to_oct(0x1234));
	printf(Q64, hex_to_oct(0xABCDEF));
	printf(Q64, hex_to_oct(0xFFFFFFFF));
	return 0;
}
 

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