rewrite for C, only while loop

#include <stdio.h>
int main(void) {
    int H, W, m, n;
    while (1) {
        scanf("%d%d", &H, &W);
        if (H == 0 || W == 0) { break; }
        m = n = 1;
        while (m <= H && n <= W) {
            if (m == 1) {
                printf("#");
                if (n == W) { printf("\n"); n = 1; m++; }
                else { n++; }
                continue;
            }
            if (m == H) {
                printf("#");
                if (n == W) { printf("\n"); n = 1; m++; }
                else { n++; }
                continue;
            }
            if (n == 1) {
                printf("#");
                if (n == W) { printf("\n"); n = 1; m++; }
                else { n++; }
                continue;
            }
            if (n == W) {
                printf("#\n"); n = 1; m++; continue;
            }
            printf("."); n++;
        }
        printf("\n");
    }
    return 0;
}