题解 | #明明的随机数#

#spend 3 hours,写的我自己都不知道怎么通过的，有懂的大佬帮忙解释一下。

int main() {
    int n;
    int i, j, k = 0;
    int rand_n[1000] = {0};
    int rand_n1[1000] = {0};
    int temp = 0;
    scanf("%d", &n);

    for (i = 0; i < n; i++) {
        scanf("%d", &rand_n[i]);

        if (i >= 0) {
            for (j = 0; j < i; j++) {
                if (rand_n[j] == rand_n[i]) {
                    break;
                }
            }
        }
        if (j == i) {
            rand_n1[k++] = rand_n[i];
        }
    }
    for (i = 0; i < k; i++) {//冒泡排序这部分需要好好看一下
        for (j = 0; j <  k - i; j++) {
            if (rand_n1[j] >
                    rand_n1[j+1]) { //不用新变量和实现两数交换
               // rand_n1[j+1] = rand_n1[j] + rand_n1[j+1];
                //rand_n1[j] = rand_n1[j+1] - rand_n1[j];
               // rand_n1[j+1] = rand_n1[j+1] - rand_n1[j];
                temp = rand_n1[j+1];
                rand_n1[j+1] = rand_n1[j];
                rand_n1[j] = temp ;
            }
        }
    }
    for (i = 1; i <= k; i++) {
        printf("%d\n", rand_n1[i]);//**?这块我真没理解为啥**
    }
 

}