一个二进制的算法

[loong0306]

最近学习了一个二进制的编写，发下看看。。没啥问题，外加散个分

#include<iostream.h>
void fun(int x)
{ 
	int k=0,r,b[10]; 
	do{  
		r=x%2;
		b[k++]=r;
		x/=2; 
	}

	while(x); 
	for(int i=0;i<k;i++)
		cout<<b[i]<<endl;
}  

int main()
{
	int x;
	cout<<"please input num:"
	cin>>x;
	fun(x);	
	return 0;
}

[middzwb]

二进制可以用递归写啊 b[10]超过10不就越界了吗

[Inhibitory]

除基取模倒序法：

    for(int i=k-1;i>=0;i++)
        cout<<b[i]<<endl;

[wxyb]

接分吧！顺便学习了！话说分数有神马用？

[loong0306]

引用 1 楼 u014356552 的回复:

二进制可以用递归写啊 b[10]超过10不就越界了吗

恩恩。。忘记啦。。嘿嘿~

[笑梦码侬生]

还有如果输入是负数，怎么办。

[middzwb]

void fun_binary(int a)
{
	if(a / 2 != 0)
	{
		fun_binary(a / 2);
	}
	cout << a % 2;
}

[caewow]

[赵4老师]

#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;

// 十进制整数转二进制串；
    i=1024;
    ltoa(i,b,2);
    sprintf(bs,"%032s",b);
    printf("i=%d,bs=%s\n",i,bs);
// 十进制整数转十六进制串；
    i=1024;
    ltoa(i,h,16);
    sprintf(hs,"%08s",h);
    printf("i=%d,hs=%s\n",i,hs);
// 十六进制字符串转成十进制数
    strcpy(hs,"00000400");
    sscanf(hs,"%x",&i);
    printf("hs=%s,i=%d\n",hs,i);
// 二进制字符串转化为十六进制字符串；
    strcpy(bs,"00000000000000000000010000000000");
    i=strtol(bs,&e,2);
    ltoa(i,h,16);
    sprintf(hs,"%08s",h);
    printf("bs=%s,hs=%s\n",bs,hs);
// 二进制字符串转化为十进制数；
    strcpy(bs,"00000000000000000000010000000000");
    i=strtol(bs,&e,2);
    printf("bs=%s,i=%d\n",bs,i);
// 十六进制字符串转成二进制串
    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字符串转十六进制串
    strcpy(s,"a汉");
    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);
// 十六进制字符串转成汉字（GBK）及字符(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;

}
//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汉,hs=61BABA
//hs=61BABA,s=a汉