linux 画直线 c程序

#include <stdio.h>

void drawLine(int x1, int y1, int x2, int y2) {
    int dx = abs(x2 - x1);
    int dy = abs(y2 - y1);
    int sx = x1 < x2 ? 1 : -1;
    int sy = y1 < y2 ? 1 : -1;
    int err = dx - dy;

    while (1) {
        printf("(%d, %d)\n", x1, y1);
        if (x1 == x2 && y1 == y2) break;
        int e2 = 2 * err;
        if (e2 > -dy) {
            err -= dy;
            x1 += sx;
        }
        if (e2 < dx) {
            err += dx;
            y1 += sy;
        }
    }
}

int main() {
    int x1 = 1, y1 = 1;
    int x2 = 10, y2 = 5;
    drawLine(x1, y1, x2, y2);
    return 0;
}