用C语言代码实现布雷森汉姆直线插补

布雷森汉姆直线插补是计算机图形学中常见的直线插补算法。以下是用C语言实现布雷森汉姆直线插补的代码示例：

#include <stdio.h>
#include <math.h>

void bresenham_line(int x1, int y1, int x2, int y2)
{
    int dx = abs(x2 - x1);
    int dy = abs(y2 - y1);
    int p = 2 * dy - dx;
    int twoDy = 2 * dy;
    int twoDyMinusDx = 2 * (dy - dx);
    int x, y;

    /* Determine which endpoint to use as start position */
    if (x1 > x2) {
        x = x2;
        y = y2;
        x2 = x1;
    } else {
        x = x1;
        y = y1;
    }

    printf("(%d, %d)\n", x, y);

    while (x < x2) {
        x++;
        if (p < 0) {
            p += twoDy;
        } else {
            y++;
            p += twoDyMinusDx;
        }
        printf("(%d, %d)\n", x, y);
    }
}

int main(void)
{
    int x1 = 2, y1 = 3, x2 = 15, y2 = 10;
    bresenham_line(x1, y1, x2, y2);
    return 0;
}

该代码实现了从点(x1, y1)到点(x2, y2)的布雷森汉姆直线插补。