十一个元素的数组a(11)随机生成10个30-80之间的数。输入一个数在数组中查找。如果有将它删除没有则插入

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

int main()
{
int a[11];
int i, j, k;
int found = 0;

srand(time(NULL));

for (i = 0; i < 10; ++i)
{
a[i] = (rand() % 80) + 30;
/* printf("%d ", a[i]); */
}

scanf("%d", &k);

for (i = 0; i < 10; ++i)
{
if (a[i] == k)
{
for (j = i; j < 9; ++j)
a[j] = a[j+1];

i = 9;
found = 1;
break;
}
}

if (!found)
{
a[i] = k;
++i;
}

for (j = 0; j < i; ++j)
printf("%d ", a[j]);

putchar('\n');
getchar();

}