C progress 1

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

int main(){
    int x, c, bi[40];
    printf("Convert Decimal to Binary program\n");
    while (1)
    {
        printf("      Enter a positive integer number: ");
        fflush(stdin);
        scanf("%d",&x);
        c = 0;
        while (x>0) {
            bi[c] = x%2;
            x /= 2;
            c++;
        }
        printf("      Binary number: : ");
        for (int i = (c-1); i>0; i--) {
            printf("%d",bi[i]);
        }
        printf("\nPress any key to do another conversion.\n\n");
        getch();
    }
    return(0);
}