OJ刷题之旅(1)

#include <stdio.h>
#include <string.h>
int main() {
int n; char c1, c2;
while (scanf("%d %c %c", &n, &c1, &c2) == 3) {
char basket[n][n];
memset(basket, c2, sizeof(basket)); // fill the entire basket with outer color
    for (int i = 0; i &lt; (n+1)/2; i++) { // build each layer of the basket
        char layer_c = (i % 2 == 0) ? c1 : c2; // determine center or outer color for this layer
        int layer_size = n - 2 * i;
        int start = i;
        int end = n - 1 - i;
        // fill top and bottom rows of the layer with outer color
        for (int j = start; j &lt;= end; j++) {
            basket[start][j] = c2;
            basket[end][j] = c2;
        }
        // fill left and right columns of the layer with outer color
        for (int j = start+1; j &lt; end; j++) {
            basket[j][start] = c2;
            basket[j][end] = c2;
        }
        // fill the center of the layer with center color
        for (int j = start+1; j &lt; end; j += 2) {
            for (int k = start+1; k &lt; end; k += 2) {
                basket[j][k] = layer_c;
            }
        }
    }
    // print the basket
    for (int i = 0; i &lt; n; i++) {
        for (int j = 0; j &lt; n; j++) {
            printf("%c", basket[i][j]);
        }
        printf("\n");
    }
    printf("\n");
}
return 0;
}