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

void reverse(char s[])//字符串倒置函数
{
    int i,j,t;
    for ( i = 0,j=strlen(s)-1; i <j; i++,j--)
    {
        t = s[i];
        s[i] = s[j];
        s[j] = t;
    }
}
void itob(int n,char s[],int b)
{
    int sign,i;
    static char b_numbers[]={"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"};
    if ((sign=n)<0)
    {
        n = -n;
    }
    i=0;
    do
    {
        s[i++] = b_numbers[n % b];
    } while ((n/=b)>0);
    if (sign<0)
    {
        s[i++]=‘-‘;
    }
    s[i]=‘\0‘;
    reverse(s);
}
int main()
{
    char array[100];
    int n,b;
    printf("请输入要转换的十进制数：");
    scanf("%d",&n);
    putchar(‘\n‘);
    printf("转换为多少进制：");
    scanf("%d",&b);
    putchar(‘\n‘);
    itob(n,array,b);
    printf("结果为：");
    for (int i = 0; array[i]!=‘\0‘; i++)
    {
        printf("%c",array[i]);
    }
    putchar(‘\n‘);
    return 0;
}