题解 | #进制转换#

#include<stdio.h>
#include<string.h>
int main()
{
    char a[1000];
    scanf("%s",a);
    int i=0, n=0, sum=0;
    int len=strlen(a);
    for(i=2; i<len; i++)
    {
        if(a[i]>='0' && a[i]<='9')
            n=a[i]-'0';
        else if(a[i]>='A' && a[i]<='F')
            n=a[i]-'A'+10;
        sum=sum*16+n;
    }
    printf("%d",sum);
}