题解 | #十六进制转十进制#

#include <stdio.h>
#include <string.h>

#define N 15

int getNum(char c)
{
    if (c >= '0' && c <= '9') return c - '0';
    return (c - 'A') + 10; 
}

char getChar(int num) 
{
    if (num >= 0 && num <= 9) return num + '0';
    else return (num - 10) + 'A';
}

int main()
{
    char s[] = {'A', 'B', 'C', 'D', 'E', 'F'};
    int res = 0;
    for (int i = 0; i < strlen(s); i ++ )
    {
        res = res * 16 + getNum(s[i]);
    }
    printf("%15d", res);
    return 0;
}