用c语言实现电子相册循环代码

以下是一个简单的循环代码示例，可以用来实现电子相册中的图片切换功能：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <graphics.h>

#define MAX_IMAGES 1000
#define MAX_FILENAME 256

char image_filenames[MAX_IMAGES][MAX_FILENAME];
int num_images = 0;
int current_image = 0;

void load_images()
{
    DIR *dir;
    struct dirent *ent;
    char *ext;

    dir = opendir(".");
    if (dir == NULL)
        return;

    while ((ent = readdir(dir)) != NULL) {
        ext = strrchr(ent->d_name, '.');
        if (ext != NULL && (strcmp(ext, ".jpg") == 0 || strcmp(ext, ".jpeg") == 0 ||
                            strcmp(ext, ".png") == 0 || strcmp(ext, ".bmp") == 0)) {
            strncpy(image_filenames[num_images], ent->d_name, MAX_FILENAME);
            num_images++;
        }
    }

    closedir(dir);
}

void draw_image(char *filename)
{
    cleardevice();
    readimagefile(filename, 0, 0, getmaxx(), getmaxy());
}

int main()
{
    int gd = DETECT, gm;
    int key;

    initgraph(&gd, &gm, "");

    load_images();

    if (num_images == 0) {
        printf("No images found.\n");
        getch();
        return 0;
    }

    draw_image(image_filenames[current_image]);

    while (1) {
        key = getch();

        if (key == 'q')
            break;

        if (key == KEY_LEFT && current_image > 0) {
            current_image--;
            draw_image(image_filenames[current_image]);
        }

        if (key == KEY_RIGHT && current_image < num_images - 1) {
            current_image++;
            draw_image(image_filenames[current_image]);
        }
    }

    closegraph();

    return 0;
}

这段代码通过load_images函数扫描当前目录下的图片文件，将其文件名存储在image_filenames数组中。接着，在主循环中，通过getch函数获取用户输入的按键，如果是左箭头或右箭头，则切换当前显示图片，并调用draw_image函数将其显示在窗口中。用户可以通过按下q键来退出程序。