while(1) { aa1 = fanhui(); display(bai, shi, ge); //用显示，当延时，消抖. aa2 = fanhui(); //再读. if (aa1 == aa2) aa = aa1; //两者相等，确认到aa－－－－－－－－－如果不相等呢？aa = ？ i = aa * aa; bai = i / 100; shi = (i % 100) / 10; ge = i % 10; display(bai, shi, ge); }另外，按键检测程序太长了！4*4的，程序可以在10行之内（不包括大括号占的行数）。到我的空间找找看。 **************************************************好了。你的延时函数里面的：for，都写成什么了？//-----------------------------------------------------void delay(uint z){ uint x, y; for (x = z; x > 0; x--) for (y = 110; y > 0; y--);}//-----------------------------------------------------void display(uchar bai, uchar shi, uchar ge){ wela = 1; P0 = 0xff; wela = 0; //消隐. dula = 1; P0 = table[bai]; dula = 0; wela = 1; P0 = 0xfd; wela = 0; delay(10); wela = 1; P0 = 0xff; wela = 0; dula = 1; P0 = table[shi]; dula = 0; wela = 1; P0 = 0xfb; wela = 0; delay(10); wela = 1; P0 = 0xff; wela = 0; dula = 1; P0 = table[ge]; dula = 0; wela = 1; P0 = 0xf7; wela = 0; delay(10);} //-----------------------------------------------------void main(){ while(1) { i = 128; bai = i / 100; shi = (i % 100) / 10; ge = i % 10; display(bai, shi, ge); }} //-----------------------------------------------------