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#include<stdio.h>//输入二进制输出整数
#include<string.h>
int btoi(char *,int);
int main(void)
{
int size;
char str[40];
puts("Please enter the binary:");
while(gets(str)!=NULL&&str[0]!='\0')
{
size=strlen(str);
printf("%s is %d\n",str,btoi(str,size));
}
return 0;
}
int btoi(char *ptr,int n)、//二转整
{
int i;
int total=0;
for(i=0;i<n;i++)
total+=(ptr[n-1-i]-'0')<<i;
return total;
}
#include<stdio.h>
int btoi(char *);
char * itob(int);
int main(int argc,char *argv[])
{
int v1;
int v2;
v1=btoi(argv[1]);
v2=btoi(argv[2]);
printf("~%s =%s\n",argv[1],itob(~v1));
printf("~%s =%s\n",argv[2],itob(~v2));
puts("Done");
return 0;
}
char *itob(int n)//整数转二进制
{
int i;
char *p;
static int size=8*sizeof(int);
for(i=size-1;i>=0;i--,n>>=1)
p[i]=(01&n)+'0';
p[size]='\0';
return p;
}
int btoi(char *p)//二转整
{
int n=0;
while(*p!='\0')
n=2*n+(*p++ -'0');
return n;
}
#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