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发表于 2021-4-18 18:42:24
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本楼为最佳答案
- #include "screen.h"
- #include <math.h>
- void draw(screen_t *screen, size_t n) {
- size_t x = 0, y = 0;
- for(y = 0; y < n; ++y) {
- screen_putchar(screen, x++, y, '@');
- }
- x = n - 1;
- for(y = 0; y < n; ++y) {
- screen_putchar(screen, x--, y, '@');
- }
- }
- int main(void) {
- screen_t *screen = screen_init(130, 40);
- size_t n;
- scanf("%lu", &n);
- draw(screen, n);
- screen_refresh(screen, stdout);
- screen_deinit(screen);
- return 0;
- }
复制代码
- #ifndef _SCREEN_H_
- #define _SCREEN_H_
- #include <stdio.h>
- #include <stddef.h>
- typedef struct {
- size_t width, height;
- char *buff;
- } screen_t;
- screen_t *screen_init(size_t width, size_t height);
- void screen_deinit(screen_t *screen);
- void screen_putchar(screen_t *screen, size_t x, size_t y, char ch);
- void screen_refresh(screen_t *screen, FILE *fp);
- void screen_draw_border(screen_t *screen, char ch);
- #endif
复制代码
- #include "screen.h"
- #include <stdlib.h>
- #include <string.h>
- screen_t *screen_init(size_t width, size_t height) {
- screen_t *screen = malloc(sizeof(*screen));
- *screen = (screen_t){width, height, malloc(width * height)};
- memset(screen->buff, ' ', screen->width * screen->height);
- return screen;
- }
- void screen_deinit(screen_t *screen) {
- free(screen->buff);
- free(screen);
- }
- void screen_putchar(screen_t *screen, size_t x, size_t y, char ch) {
- if(x < screen->width && y < screen->height)
- screen->buff[y * screen->width + x] = ch;
- }
- void screen_refresh(screen_t *screen, FILE *fp) {
- for(size_t y = 0; y < screen->height; ++y) {
- for(size_t x = 0; x < screen->width; ++x) {
- fputc(screen->buff[y * screen->width + x], fp);
- }
- fputc('\n', fp);
- }
- }
- void screen_draw_border(screen_t *screen, char ch) {
- for(size_t y = 0; y < screen->height; ++y) {
- for(size_t x = 0; x < screen->width; ++x) {
- if(y == 0 || x == 0 || y == screen->height - 1 || x == screen->width - 1)
- screen_putchar(screen, x, y, ch);
- }
- }
- }
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