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#include<stdio.h>
#define MAX 1000
void main()
{
int htoi(char s[]);
int c, i, flag, flag1;
char t[MAX];
i = 0;
flag = 0;
flag1 = 1;
printf("\ninput a HEX number:");
while ((c = getchar() )!= '\0'&&i < MAX && flag1)
{
if (c >= '0' && c <= '9' || c >= 'a' && c <= 'f' || c >= 'A' && c <= 'F')
{
flag = 1;
t[i++] = c;
}
else if (flag)
{
t[i] = '\0';
printf("decimal number %d:\n", htoi(t));
printf("continue or not?");
c = getchar();
if (c == 'N' || c == 'n')
flag1 = 0;
else
{
flag = 0;
i = 0;
printf("\ninput a HEX number:");
}
}
}
}
int htoi(char s[])
{
int i, n;
n = 0;
for (i = 0; s[i] != '\0'; i++)
{
if(s[i] >= '0' && s[i] <= '9')
n = n * 16 + s[i] - '0';
if (s[i] >= 'a' && s[i] <= 'f')
n = n * 16 + s[i] - 'a' + 10;
if (s[i] >= 'A' && s[i] <= 'F')
n = n * 16 + s[i] - 'A' + 10;
}
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
#include<stdio.h>
#define MAX 1000
void main()
{
int htoi(char s[]);
int c, i, flag, flag1;
char t[MAX];
i = 0;
flag = 0;
flag1 = 1;
printf("\ninput a HEX number:");
while ((c = getchar() )!= '\0'&&i < MAX && flag1)
{
if (c >= '0' && c <= '9' || c >= 'a' && c <= 'f' || c >= 'A' && c <= 'F')
{
flag = 1;
t[i++] = c;
}
else if (flag)
{
t[i] = '\0';
printf("decimal number %d:\n", htoi(t));
printf("continue or not?");
//c = getchar();
if (c == 'N' || c == 'n')
flag1 = 0;
else
{
flag = 0;
i = 0;
printf("\ninput a HEX number:");
}
}
}
}
int htoi(char s[])
{
int i, n;
n = 0;
for (i = 0; s[i] != '\0'; i++)
{
if(s[i] >= '0' && s[i] <= '9')
n = n * 16 + s[i] - '0';
if (s[i] >= 'a' && s[i] <= 'f')
n = n * 16 + s[i] - 'a' + 10;
if (s[i] >= 'A' && s[i] <= 'F')
n = n * 16 + s[i] - 'A' + 10;
}
return(n);
}
int main(void)
{
char str[11];
scanf("%s", str);
long l;
sscanf(str, "%x", &l);
printf("l=%d\n", l);
return 0;
}
//16
//l=22