[C語言] n個不同的數可組成多少個不同的三位數

#include<stdio.h>
 
int main()
{
    int i = 0, j = 0, k = 0;
    int S = 0, count = 0, n = 0;
    printf("請輸入個數：");
    scanf_s("%d", &n);
    for (i = 1; i <= n;i++)
        for (j = 1; j <= n; j++)
            for (k = 1; k <= n; k++)
            {
                S = i * 100 + j * 10 + k;
                count++;
                printf("%d ", S);
            }
            printf("\n");
            printf("count=%d\n",count);
            system("pause");
    return 0;
}