最近在做一些**演算法的處理，由於借鑑了許多已存在模組，處理時使用了許多字串和進位制轉換函式，過程中從下面幾個函式中得到許多幫助。

論壇參考連結: https://bbs.csdn.net/topics/390991981

十進位制整數轉二進位制串
十進位制整數轉十六進位制串
十六進位制字串轉成十進位制數
二進位制字串轉化為十六進位制字串
二進位制字串轉化為十進位制數
十六進位制字串轉成二進位制串
ASC\GBK字串轉十六進位制串
十六進位制字串轉成漢字（GBK）及字元(ASC)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>

int main() {
    int i,v;
    char bs[33];
    char b[33];
    char hs[9];
    char h[9];
    char s[4];
    char *e;

// 十進位制整數轉二進位制串；
    i=1024;
    ltoa(i,b,2);
    sprintf(bs,"%032s",b);
    printf("i=%d,bs=%s\n",i,bs);
// 十進位制整數轉十六進位制串；
    i=1024;
    ltoa(i,h,16);
    sprintf(hs,"%08s",h);
    printf("i=%d,hs=%s\n",i,hs);
// 十六進位制字串轉成十進位制數
    strcpy(hs,"00000400");
    sscanf(hs,"%x",&i);
    printf("hs=%s,i=%d\n",hs,i);
// 二進位制字串轉化為十六進位制字串；
    strcpy(bs,"00000000000000000000010000000000");
    i=strtol(bs,&e,2);
    ltoa(i,h,16);
    sprintf(hs,"%08s",h);
    printf("bs=%s,hs=%s\n",bs,hs);
// 二進位制字串轉化為十進位制數；
    strcpy(bs,"00000000000000000000010000000000");
    i=strtol(bs,&e,2);
    printf("bs=%s,i=%d\n",bs,i);
// 十六進位制字串轉成二進位制串
    strcpy(hs,"00000400");
    sscanf(hs,"%x",&i);
    ltoa(i,b,2);
    sprintf(bs,"%032s",b);
    printf("hs=%s,bs=%s\n",hs,bs);
// ASC\GBK字串轉十六進位制串
    strcpy(s,"a漢");
    i=0;
    while (1) {
        if (0==s[i]) break;
        sprintf(hs+i*2,"%02X",(unsigned char)s[i]);
        i++;
    }
    setlocale(LC_ALL,"chs");
    printf("s=%s,hs=%s\n",s,hs);
// 十六進位制字串轉成漢字（GBK）及字元(ASC)
    strcpy(hs,"61BABA");
    i=0;
    while (1) {
        if (1!=sscanf(hs+i*2,"%2x",&v)) break;
        s[i]=(char)v;
        i++;
    }
    s[i]=0;
    printf("hs=%s,s=%s\n",hs,s);

    return 0;

}
 

//結果顯示：
//i=1024,bs=00000000000000000000010000000000
//i=1024,hs=00000400
//hs=00000400,i=1024
//bs=00000000000000000000010000000000,hs=00000400
//bs=00000000000000000000010000000000,i=1024
//hs=00000400,bs=00000000000000000000010000000000
//s=a漢,hs=61BABA
//hs=61BABA,s=a漢