10進制轉2進制

#include <stdlib.h>
#include <stdio.h>
#define NUM_INTEGER_BIT 32
void PrintBin(int *a_piBin);
void DecToBin(int a_iDec,int *a_piBin);
void DecToRevBin(int a_iDec,int *a_piBin);
int main()
{
    int iDec = 3;
    printf("iDec = %d\n",iDec);
    int iBin[NUM_INTEGER_BIT] = {0};
    DecToBin(iDec,iBin);
    PrintBin(iBin);
    DecToRevBin(iDec,iBin);
    PrintBin(iBin);
     system("pause");
    return 0;
}
void PrintBin(int *a_piBin)
{
    int i=0;
    for(i=0;i<NUM_INTEGER_BIT;++i)
        printf("%d",a_piBin[i]);
    printf("\n");
}
void DecToBin(int a_iDec,int *a_piBin)
{
    int i=NUM_INTEGER_BIT-1;
    for(;i>=0;--i)
    {