给定一个三位数，输出有三位数字组成的最大数 c语言

求大佬给答案
急求大佬急求急求急求～～

int main()
{
    int n = 156;
    int a, b, c,temp;
    a = n / 100;
    b = n / 10 % 10;
    c = n % 10;
    if (a > b) { temp = a, a = b, b = temp; }
    if (b > c) { temp = b, b = c, c = temp; }
    if (a > b) { temp = a, a = b, b = temp; }
    printf("%d\n", c * 100 + b * 10 + a);
    return 0;
}