把 n 用m 进制显示

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作者在 2010-07-03 00:15:20 发布以下内容

#include <stdio.h>
// #include <WATLIB.H> 测试表明lib库不通用
//#include <vcLIB.H>

typedef char BOOL ;
typedef unsigned char UCHAR8 ;

#define NUM 10

void PN(int n,int m) /* 把 n 用m 进制显示 */
{
 char temp[10]={0};
 int i=0;
 do {
 temp[i] = n%m;
 i++;
 n /= m;
 }while(n>0);
 for(i -= 1;i>=0;i--){
 printf("%x",temp[i]);
 }
}

int main()
{
 int i;
 int date[NUM];

 for (i=0;i<NUM ;i++)
 {
 date[i] = i;
 PN(date[i],2);printf("\t");
 }
 printf("\n");
 for (i=0;i<NUM ;i++)
 {
 date[i] ^= (date[i]>>1); // 转成BCD Gray 码
 PN(date[i],2);printf("\t");
 }
 printf("\n");

 for (i=0;i<NUM ;i++)
 {
 int temp = date[i];// 转成BCD Gray 码
 while (temp>0)
 {
 temp >>= 1;
 date[i] ^= temp;
 }
 PN(date[i],2);printf("\t");
 }

 return 0;
}

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vfdff(作者)

2010-07-09 01:02

// test.cpp : Defines the entry point for the console application. 
// JPEG2000 中小波参数浮点系数转定点 
 
#include "stdafx.h" 
#include <iostream> 
#include <stdio.h> 
using namespace std; 
 
union data { 
                //unsigned long ul; 
                __int64 ul; 
                struct { 
                        signed  l ; 
                        signed  h ; 
                }inner0; 
#define  HHH        inner0.h 
#define  LLL        inner0.l 
}test; 
 
//--0="1001101001111101";-1.586134342 
//--1="1111110010011100";-0.052980118 
//--2="0011100010000001"; 0.882911076 
//--3="0001110001100010"; 0.443506852 
//--4="0011011110101011";        
//--5="0100100110010011"; 1.149604398 
// 
//constant cst0 : std_logic_vector(15 downto 0):="1001101001111101"; --16 
//constant cst1 : std_logic_vector(13 downto 0):="11111100100111";   --14 
//constant cst2 : std_logic_vector(14 downto 0):="011100010000001";  --15 
//constant cst3 : std_logic_vector(13 downto 0):="01110001100010";   --14 
//constant cst4 : std_logic_vector(15 downto 0):="0011011110101011"; --16 
//constant cst5 : std_logic_vector(15 downto 0):="0100100110010011"; --16 
 
int main() 
{ 
        double cst0 = -1.586134342 ; 
    int num0 = (int)(cst0 *(1<<14)); 
        double cst1 = -0.052980118 ; 
        int num1 = (int)(cst1 *(1<<12)); 
        double cst2 = 0.882911076 ; 
        int num2 = (int)(cst2 *(1<<14)); 
        double cst3 = 0.443506852 ; 
        int num3 = (int)(cst3 *(1<<14)); 
        double cst4 = 1/1.149604398 ; 
        int num4 = (int)(cst4 *(1<<14)); 
        double cst5 = 1.149604398 ; 
        int num5 = (int)(cst5 *(1<<14)); 
 
        //union data test; 
        test.ul = 0xfff5123f5678; 
 
        //printf("%12xl,%x,%x,%d\n\n",test.ul,test.H,test.L,sizeof(union data)); 
        printf("%d,%d,%d\n\n",sizeof(long),sizeof(unsigned long),sizeof(__int64)); 
        printf("%12x,%x,%x,%x\n\n",0xfff5123f5678,test.HHH,test.LLL,sizeof(long)); 
        
        printf("%X\n",num0); 
        printf("%x\n",num1); 
        printf("%x\n",num2); 
        printf("%x\n",num3); 
        printf("%x\n",num4); 
        printf("%x\n",num5); 
 
        printf("%d\n",num0); 
        printf("%d\n",num1); 
        printf("%d\n",num2); 
        printf("%d\n",num3); 
        printf("%d\n",num4); 
        printf("%d\n",num5); 
        return 0; 
}

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