C++单个字符二进制与十六进制互相转换

一、单个字符二进制转换成十六进制

声明：extern void bintohex(int *binary, char *hex); 
 
int str[]={1,1,0,1,0,1,0,1,0,1,0,1,0,1,1,1};

 char *hex =(char *)malloc(sizeof( char));
 int i=0,k=0;
while (str[i]==0 || str[i]==1 ){k++; i++;}//计算长度
bintohex(str,hex);
for (int t=0; t< k/4; t++)printf("%c",hex[t]);




void bintohex(int *binary, char *hex ) 
{
    int i=0,j=3,k=0,s = 0;

             //计算整形数组的长度
             while (binary [i]==0 || binary[i]==1 ){k++; i++;}
                               
             //char *hex =(char *)malloc(sizeof(char));
             int *b = (int *)malloc(strlen(hex)* sizeof(int ));
 
                         //把二进制的每个字符转换成十六进制
             for (i = 0; i < k/4; i++)
            {
                        b[i]= binary[j]+binary [j-1]*2+binary[j-2]*4+ binary[j-3]