[C/C++] Swap 문제 (난이도 *)

문제] 알맞은 swap 구현하기 (reference , pointer 사용)

int iNumA = 20;

int iNumB = 30;

swap_CallByValue (iNumA, iNumB);

swap_CallByReference_reference (iNumA, iNumB);

swap_CallByReference_pointer (&iNumA, &iNumB);

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void swap_CallByValue ( int iA, int iB)

{

int iTemp = iA;

iA = iB;

iB = iTemp;

}

void swap_CallByReference_reference ( int &iA, int &iB)

{

int iTemp = iA;

iA = iB;

iB = iTemp;

}

void swap_CallByReference_pointer ( int *iA, int *iB)

{

int iTemp = *iA;

*iA = *iB;

*iB = iTemp;

}