/*进制转换*/

#include<stdio.h>
int main()
{
    int i,j;
    char hexad[80],str[80];
    long number;
    printf("Ennter a string:");
    i=0;
    while((str[i]=getchar())!='#')
    i++;
     str[i]='\0';
       j=0;
       for(i=0;str[i]!='\0';i++)
       if(str[i]>='0'&&str[i]<='9'||str[i]>='a'&&str[i]<='f'||str[i]>='A'&&str[i]<='F'){
           hexad[j]=str[i];
           j++;
       }
        hexad[j]='\0';
        printf("New string:");
        for(i=0;hexad[i]!='\0';i++)
         putchar(hexad[i]);
        printf("\n");
        number=0;
        for(i=0;hexad[i]!='\0';i++){
            if(hexad[i]>='0'&&hexad[i]<='9')
             number=number*16+hexad[i]-'0';
            else if(hexad[i]>='A'&&hexad[i]<='F')
             number=number*16+hexad[i]-'A'+10;
            else if(hexad[i]>='a'&&hexad[i]<='f')
             number=number*16+hexad[i]-'a'+10;
        }
        printf("Number=%ld\n",number);
        return 0;
}