編寫函數(shù)to_base_n()，輸入任意十進制正整數(shù)和進制數(shù)，然后按照指定進制輸出
輸入樣例

129 8

輸出樣例

201  //129的八進制數(shù)

示例程序

#include<stdio.h>
int to_base_n(unsigned long x,int y);
int main()
{
    unsigned long num;
    int base;
    printf("please enter two integer:(q to quit)\n");
    while (scanf("%ld %d", &num, &base) == 2)
    {
        if (base < 2 && base>10)
            break;
        printf("%d base equivalent: \n", base);
        to_base_n(num, base);
        putchar('\n');
        printf("please enter two integer:(q to quit)\n");
    }
    printf("bye.\n");
    getchar();
    getchar();
    return 0;
}
int to_base_n(unsigned long x, int y)  //遞歸函數(shù)
{
    int r;
    r = x%y;
    if (x >= y)
    {
        to_base_n(x / y,y);
    }
    printf("%d", r);
    return 0;
}