将一个十进制数转化为16进制数

#include<stdio.h>
#include<stdlib.h>

int main()
{
    int ival;

    char result[8] = "";
    char array[17] = "0123456789ABCDEF";
    int index = -1;
    printf("input the value:
");
    scanf_s("%d",&ival);

    while(ival != 0)
    {
        index++;
        result[index] = array[ival % 16];
        ival = ival / 16;
    }
    printf("Hex:");
    while(index >= 0)
    {
        printf("%c",result[index]);
        index--;
    }
    system("pause");
    return 0;
}