generate a new random number and store in an array and retrieve array value

I am new to C language. When I try to generate a new number, I get the same random number every time. Also, I am trying to store the random number to a pre-declared array in the for loop, and retrieve it from another for loop, but the integer doesn't store in the array correctly.

How do I correctly generate a new random number every time, and how to store integer in the array?

Here is my code:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/wait.h>
#include <time.h>
int main()
{
int randNum[4] = {0,0,0,0};       
srand(time(NULL));
for(int i = 0; i < 4; i++)
{ 
    if(fork() == 0)
    {
        randNum[i] = rand() % 100;
        for(int j = 0; j < 4; j++)
        {
            printf("%d\t", randNum[j]);
        }
        exit(0);
    }
    wait(NULL);
}
}

printf prints the following each loop

84      0       0       0 
0       84      0       0 
0       0       84      0 
0       0       84      0