Fix

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
int main() {

    srand(0);
    int i = 0, n = 0, count = 0, roll = 0;
    double frequency = 0.0;
    printf("Enter the number of times to roll the dice: ");
    scanf("%d", &n);
    for (i = 0; i < n; i++)
    {
        roll += (rand() % 6) + 1;
        if (roll >= 20)
        {
            count++;
            roll = 0;
        }
    }
    frequency = (((double)count)/ ((double)n) * 100);
    printf("Frequency of the #20 seen: %d", frequency);

    return 0;
}