Insert a number into the ordered array (Bubble + rand function)

Randomly generated 20 individual 【1,100】 The data of , Order from small to large , Enter a number from the keyboard , Inserting into the ordered array does not change the original sorting rule . use C Written language .

#include <stdio.h>
#include <stdlib.h>
#include <time.h>// Generate header files for random numbers  
#define N 20
int main() {
	int a[N + 1], i, j, t,temp, posi;//
	srand(time(0));// Computers can't produce real random numbers , So you just call rand, Every time something comes out 
    // It's the same ,Srand Is the number of random seeds planted , You plant different seeds every time , use Rand The random number obtained is different  
	for (i = 0; i < N; i++)
		a[i] = rand() % 101;//rand()%n, It's random 0~(n-1) Number between 
	for (i = 1; i < N; i++)
		for (j = 1; j < N; j++)// First sort with bubbles  
			if (a[j - 1] > a[j]) {
				temp = a[j - 1];
				a[j - 1] = a[j];
				a[j] = temp;
			}
	for (i = 0; i < N; i++)
		printf("%d ", a[i]);
	printf("\n Say it. , What number do you want to enter :");
	scanf("%d", &t);
	for (i = 0; i < N; i++)
		if (t < a[i])
			break;
			posi = i;// Subscript for the number of inserts 
	for (i = N - 1; i >= posi; i--)// Move the following numbers one bit back  
		a[i + 1] = a[i];
	    a[posi] = t;
	for (i = 0; i < N + 1; i++)// Print  
		printf("%d ", a[i]);
}

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