該題中主要用到了整型相除截斷的技巧。例如,計算行數和輸出時候判斷是否為最後一列。 [cpp] #include <stdio.h> #include <stdlib.h> #include <string.h> int cmp(const void *_a, const void *_b) { char *a = (char*)_a; char *b = (char*)_b; return strcmp(a, b); } // 根據len長度的字符串,不足以空格補齊 void print(char st[], int len) { int tmp = len - strlen(st); printf("%s", st); while (tmp--) printf(" "); } int main() { int n; char s[105][65]; while (scanf("%d", &n) != EOF) { int lMax, c, r; lMax = c = r = 0; for (int i=0; i<n; i++) { scanf("%s", s[i]); int tmp = strlen(s[i]); if (tmp > lMax) lMax = tmp; } c = 62 / (lMax+2); // 計算列數 r = (n+c-1) / c; // 計算行數 qsort(s, n, sizeof (s[0]), cmp); printf("------------------------------------------------------------\n"); for (int i=0; i<r; i++) { for (int j=0; j<c; j++) { int tmp = j*r + i; if (tmp >= n) continue; if (tmp >= ((int)((n-1)/r))*r) // 如果為最後一列 print(s[tmp], lMax); else print(s[tmp], lMax+2); } printf("\n"); } } return 0; }